What to do if the spark plugs on a carburetor engine are flooded

The technical term "flooded candles" is specific and has several meanings.

1. The engine will not start. When you unscrew the spark plugs, it turns out that they are completely wet with gasoline. But this does not mean at all that the engine did not start precisely because the spark plugs were wet. They will be in gasoline in any case when the internal combustion engine is turned with the starter when trying to start. Gasoline entered the combustion chamber, but did not burn because the engine did not start, which is why the spark plugs will be flooded in 100% of cases. In such cases, you should figure out why the internal combustion engine did not start (breakdowns, frost, weak battery), eliminate the cause and try to start again. In this case, it is advisable to clean the candles, burn them or simply wipe them, and check for a spark. Otherwise, when eliminating other problems, the internal combustion engine may not start now precisely because of flooded spark plugs.
2. The engine does not start precisely because, immediately at the first attempt to start, the spark plugs are filled with gasoline to such an extent that the spark disappears or becomes very weak. In this case, flooded spark plugs are not an incidental phenomenon, but the main cause of the problems.

Why are the candles flooded?

Let's first look at the reasons why the spark plugs on the injector are flooded. To do this, consider the operation of a car starter.

Thanks to the operation of its pistons and valves, a mixture of gasoline and air is supplied to the combustion chamber, which is ignited by a spark generated by the spark plugs. After ignition, the starter turns off. Thanks to ignition, the engine cylinders start working. To successfully start the engine, you need a working starter, a powerful battery and a favorable ambient temperature.

At low temperatures, gasoline does not mix well with air. It is known that frosty air contains more oxygen. An increase in oxygen content requires the supply of more gasoline. The vehicle's electronic control unit sends a signal to the fuel injectors, which increases the fuel supply. Thanks to the starter, compression is created in the cylinders and at the same time a spark is formed to ignite the fuel mixture. But since the compression does not meet the standards and the spark is weak, the incoming gasoline will flood the spark plugs, preventing the mixture from igniting. This is the reason why candles are poured in cold weather.

The formation of a spark is influenced by the following factors:

• Gasoline quality. It should not contain many impurities and dirt, as this will affect the operation of the injectors.
• Engine wear. If the engine pistons are worn out, they do not create the necessary pressure and fuel may flood the injector.
• Quality of candles.
• Quality of injector and carburetor.
• Battery power: You should monitor its charging.

If the compression is ideal, the engine will start even with minimal impulse and fuel fluid will never fill the injector. But only a new car can boast of such compression. If a car, for example, such as a VAZ, is more than three years old, gasoline fills the spark plugs on the injector more often.

There is a spark, the starter turns normally, but the spark plugs are flooded

Quite often you can encounter a situation where there is a spark, the spark plugs are flooded, and the starter spins the crankshaft well. In such a case, the spark plugs may require a separate check, since the presence of a spark on them does not mean that the same spark will always be created under pressure. In other words, if there was a spark on the unscrewed spark plug, then after installation on the engine it may disappear. The reason is increased pressure in the combustion chamber, which is created during the operation of the internal combustion engine. To find out, you need to carry out diagnostics on a special stand for checking spark plugs, which simulates the operation of these elements taking into account high pressure (similar to the operation of spark plugs in the combustion chamber).

Also, attention should be paid to the valve timing, since their failure may be the cause of flooded spark plugs. Note that on engines with an injector, problems with the bypass valve in the fuel rail are also possible. To eliminate the possibility of its malfunction, you will need to measure the fuel pressure in the rail. It is important to understand that fuel must be supplied to the cylinders under a certain pressure. Deviations, both upward and downward, can lead to flooding of spark plugs and the inability to start the internal combustion engine.

At the same time, the injectors themselves and ECM sensors may need diagnostics. For example, in the event of a malfunction, the coolant temperature sensor may send incorrect data to the computer. In this case, the control unit enriches the mixture and the injectors overflow fuel. In rare cases, the electronic engine control unit itself fails.

What to do if the candles are flooded.

How to start a car if the engine spark plugs are flooded. In the case where the spark plugs are wet from gasoline in an injection engine, you should unscrew the spark plugs, hold them on the fire with pliers (dry them), and turn the starter without installed spark plugs for about 10 seconds to ventilate the pistons. After this, the spark plugs are tightened and, as a rule, the car starts.

How to dry the cylinders without unscrewing the spark plugs in the injector

Dry the cylinders in this order:

1. The gas pedal is pressed all the way to the maximum.
2. Turn the ignition key and turn the starter for about 10 seconds.
3. Release the gas pedal.

If the gas pedal is pressed, the throttle valve is open, due to which air circulates and the spark plugs dry out.

In this simple way, you can start a fuel-injected car after filling the spark plugs with gasoline.

If the method of drying without dismantling the candles does not help, then you will have to dry the candles manually. Manual cleaning is better, since the electrode itself can also be quickly cleaned of carbon deposits and heated over a fire, and the gap can be checked.

Spark plugs are not expensive; those who don’t want to bother and clean them buy new ones that are appropriate for the given engine.

The service life of spark plugs is from 15 to 25 thousand kilometers.

If simple minor repairs and simple actions to eliminate this cause do not help, then it is necessary to carry out in-depth diagnostics: checking the ignition system, ignition coil, injectors, temperature sensor, Hall sensor.

The video shows a solution to the problem: why the injector does not start in cold weather.

Source

The third reason is the generator

If after replacing the ignition coil and switch the spark does not appear, then we check the generator. Here we need a multimeter. We set the device to the diode position, remove the generator chip and begin the test. Two wires are responsible for the spark:

• blue with a white stripe is a hall sensor;
• black with a red stripe is the coil on the generator.

Generator chip

Checking the hall sensor. We connect the probe from the device to the blue wire with a white stripe. And we connect the other probe to engine ground. Numbers should appear on the device, indicating that the hall sensor is working.

We do the same work with the coil on the generator. If the numbers are displayed on the device, then the coil on the generator is working. If nothing happens on the device, then you will have to change the generator or hall sensor.

Features of starting a car in cold periods

In cold weather, before starting, you must first load the battery, then disconnect it for a while. After waiting a few minutes, you can try turning the starter to start the engine. If you fail to start the car on the first try, then in order not to fill the injector, you must wait a few more minutes. If all preventive measures were carried out in full before the frost, then there should be no problems with filling fuel.

We can list several conditions that are considered optimal for normal operation of the injector:

• presence of a working starter;
• maximum battery charge. The battery is powerful and in good condition;
• seasonal lubricant is used;
• spark plugs and high voltage electrical circuits must be in perfect condition;
• clean, adjusted nozzles are installed;
• The gas tank is filled with high-quality fuel.

There is an opinion among experienced drivers that driving a car along a highway at a speed of 120 km/h promotes self-cleaning of automobile systems, including the fuel system. You can also run the engine at 5000 rpm for about 10 minutes in the morning. The effect is similar to racing on a track.

It is believed that when high pressure is created in the systems, self-cleaning occurs. These measures can only be carried out if the car is in good condition and a significant increase in pressure in the systems will not harm it.

What steps do you need to take to get started?

The question arises, what to do if the car is not old, all systems are in order, but in the cold it refuses to start? When turning the spark plugs out, it turns out that they are wet. As already mentioned, in the cold season, the cause of this phenomenon may be weak compression, low-quality fuel or a weak battery.

Let's look again at the manufacturer's instructions. The book on car operation defines the following algorithm of actions:

1. Turn out the spark plugs.
2. Wipe them thoroughly and dry them.
3. Run the starter for a few seconds.
4. Put everything in place.

Often, car owners clean the injector using various fuel additives. This is not recommended at all, firstly, the quality of the fuel mixture is lost, which negatively affects the operation of the entire piston group, and secondly, the injector should be cleaned using special equipment.

Experienced drivers carry several sets of spare spark plugs with them. The quality of the spark produced depends on the technical characteristics of this ignition component. There is no point in saving on candles, their cost is not that high, and low-quality candles can cause a lot of problems.

Signs of flooded spark plugs, how the fuel ignition process occurs

To understand the reasons for what happened, it will be enough to remember how ignition occurs in the combustion chamber. The physical aspect of the issue is as follows. In the process of feeding gasoline into the chamber, it is mixed with air, high pressure ensures that the combustible mixture is sprayed around the spark plug.

In a heated engine, the combustible mixture also has a temperature sufficient for its active evaporation; the presence of flammable vapors significantly facilitates the ignition process.

Low air temperature outside leads to strong cooling of the car; the temperature of the gasoline in the tank drops to levels at which there is practically no evaporation.

Temperatures below 0 degrees further aggravate the situation. Additionally, the sprayed flammable mixture condenses into large droplets, and the chance of successfully starting the engine is significantly reduced, or the start becomes impossible altogether.

If we consider the issue from the point of view of organizing work processes in an injection-type engine, then as a reason we can name the principles that guide the electronic brain of the car.

Sub-zero temperatures will require increased effort to form a combustible mixture: the presence of an increased amount of oxygen in the air will necessitate an increase in the amount of gasoline supplied. Naturally, the Electronic Control Unit will instruct the injectors to increase the volume of gasoline supplied.

If the car battery has considerable service life, then the following phenomena will occur: the injectors will supply fuel, the actions of the starter will be aimed at creating compression in the cylinders. At the same time, the battery must provide a spark capable of generating a flash.

A new motor that is in perfect condition will, of course, be able to start even if there is a weak impulse. By the way, the spark plugs of injectors on new cars are filled much less frequently, and in any weather.

In practice, when the compression is not high enough and at low temperatures, the injectors continue to supply fuel. The candles are flooded and they stop “showing signs of life.”

We recommend: Replacing the handbrake cable on a VAZ 2107

How to act to avoid trouble

• firstly, you need to monitor the battery charge level and check it periodically (this is especially true in winter);
• secondly, check the serviceability and if any problems arise, do not be lazy to go for diagnostics;
• thirdly, only the best quality, which is suitable for use in winter;
• fourthly, promptly change and inspect high-voltage wires for the fact of their probable failure;
• fifthly, regulate and. This is easy to do - add one of the special compounds that are sold in stores to the tank;
• Sixth, use high quality. To do this, refuel at trusted gas stations.

Remember that in the cold season the engine does not like small trips at low speed.

Hello, dear car enthusiasts! Maybe not all, but many motorists are faced with this problem: yesterday I arrived, put the car in the garage, everything was fine. This morning I started to start the engine, but it would not start.

There could be a number of reasons for this

But today we will look at the most common one - filling the spark plugs with gasoline, it doesn’t matter whether you have an injector or a carburetor. Fills spark plugs with gasoline regardless of the type of vehicle fuel system

It is characteristic that the spark plugs are filled with gasoline less often in the warm season, and more often at sub-zero temperatures. So let’s try to figure out in order: why the spark plugs in the injector are flooded, what to do to start the engine at the exact moment when they are flooded, and how to prevent them from being flooded with gasoline in the injector.

Reasons why the spark plugs in the injector flood

In principle, the reason why the injector spark plugs flood is simple. And the tones lie in the peculiarities of the “electronic brain” of your car.

At subzero temperatures, mixing the fuel-air mixture requires some effort: more oxygen in cold air requires more gasoline. Accordingly, the ECU gives a command to the injector nozzles to increase the fuel supply, which they do in good faith.

And the following happens in the engine, especially if your car no longer has a new battery. The injectors supply fuel to the combustion chamber, the starter tries to create the necessary compression in the cylinders, while at the same time trying to provide a spark to generate a flash. Do not forget about the quality of fuel, which does not have ideal parameters.

As a result, with ideal compression, the injector spark plugs can start even with a minimum impulse, but ideal compression is only found in a new car. Actually, this is why, as a rule, the injector spark plugs of a new car do not fill.

The spark is weak, compression in the cold does not correspond to the parameters, and the injectors continue to supply fuel to the combustion chamber. Which, in turn, floods the candles and they simply stop showing signs of fiery life.

This is the answer to the question - why are they filled in on the injector?

There are two options for resolving the issue. As a rule, the “smart” operating book says: if the injector spark plugs are filled with gasoline, you need to unscrew them and dry them. With the spark plugs removed, crank the starter for 10-15 seconds. Put it back in and start the engine. These are actions according to the manufacturer.

A proven popular driving method. If your spark plugs are filled with gasoline, before unscrewing and drying them, try to start the engine in the following way: purge mode.

For the injector: the gas pedal is pressed all the way to the floor. Use the starter to crank the engine for 10-12 seconds, release the gas pedal. The engine should start. The fact is that in this way, by cutting off the fuel supply, you blow air through the spark plugs.

The engine did not start. Then try to dry them. Spark plugs for an injector are, in principle, no different from a carburetor engine. Therefore, we again use the “old-fashioned” method: we unscrew them, clean them from carbon deposits with a metal brush, or a toothbrush, and dry them either with a hairdryer, or on a gas stove or in the oven. We check the gap and screw the spark plugs for the injector into place. The engine should start.

If the story of filling the spark plugs with gasoline repeats itself every morning, you need to carry out diagnostics: spark plug quality, injector cleanliness, spark output from the ignition coil, Hall sensor.

How to replace a spark plug

This article is intended for beginners. It makes sense to check the condition of the spark plug when the engine is unstable, hard to start, or consumes a lot of fuel. By the appearance of the spark plug, you can determine whether the settings of the fuel system, in particular the carburetor, are correct. If the check shows that the spark plug is heavily soiled or damaged, it should be replaced. Fortunately, candles are very inexpensive. How to choose a spark plug for a scooter and what the alphanumeric values ​​in its marking mean can be read here. To do this job, we will need a 10mm socket wrench, as well as a 21mm spark plug wrench or spark plug socket.

So we need to get to the spark plug. Fortunately, access is very easy.

First you need to open the seat and use a 10mm wrench to unscrew the 4 bolts securing the seat to the frame. For a Honda Tact scooter, you will need to unscrew and remove the oil tank cap. After unscrewing the bolts, remove the seat.

Now, turning the spark plug head left and right, we pull it off the spark plug.

After that, take the spark plug wrench and place it on the spark plug. It may turn out that the spark plug wrench is too long and it rests on the frame, making it impossible to put it on the spark plug. This was the case in my case. Therefore, instead of a spark plug wrench, I just took a 21 socket and an adjustable wrench. Unscrew the spark plug counterclockwise.

That's all. Now you can evaluate the appearance of the candle and, if necessary, replace it with a new one, proceeding in the reverse order.

Please note: This article and the images in it are subject to copyright. Partial or complete reproduction on other resources without permission is prohibited.

Why does it flood the candles when it’s cold?

If the spark plugs become wet in the summer, the car will start. And if it’s flooded in winter, it usually won’t start.

Signs of flooded candles are:

1. The starter turns the crankshaft, but the engine still doesn’t want to start.
2. When you try to start the car for a long time and the engine does not start, there is a strong smell of gasoline coming from the muffler.
3. When dismantling a flooded spark plug, its thread and electrode are wet, and there is dark carbon deposits at the bottom of the spark plug, where the spark is produced.

Fills spark plugs on both injection and carburetor engines. Injection engines are flooded less frequently than engines with carburetors. If contactless ignition is installed, then it can still contribute to the production of a spark in the candle, because contact converts energy up to 18 kilovolts, and contactless electronic up to 24 kilovolts.

If the fuel-air mixture in the cylinder misses ignition, there is a lot of it, as a result of which the fuel mixture is not able to ignite in subsequent cycles.

Reasons for flooding spark plugs of injection and carburetor engines:

1. Insufficient battery charge. Sealed, maintenance-free batteries must be charged according to strict rules. Low battery charge is the reason for flooded spark plugs, mainly in injection engines, since the injector and a bunch of stuffed electronics consume a lot of energy resources, a powerful battery is needed.
2. There is a problem with the ignition system. This is either broken spark plugs or high-voltage wires. Old spark plugs may produce an infrequent spark or a misfire if the tip gap is not within normal range. High-voltage wires are also often punctured if they are of poor quality.
3. Gasoline is of very low quality. Nowadays, private gas stations are common; it is enough to obtain the appropriate permits and start selling fuel. As a rule, no one checks the quality. Therefore, you should refuel at reputable large gas stations. Due to bad gasoline, condensation collects in the fuel system. Problems with starting a car in the cold season with low-quality fuel are especially noticeable.

The electronic control unit of the injection engine determines the outside temperature and the engine temperature, determines the oxygen content of the air flow entering the engine. Next, the control unit sends a signal to the injectors to increase the supply of injected fuel, which helps create a rich fuel-air mixture for reliable engine starting in cold weather.

Cars with high mileage have a certain wear of parts of the cylinder-piston group; compression in the cylinders, accordingly, becomes less, but within acceptable limits. With low compression, when the spark plugs are flooded, it is more difficult for the engine to start. With high compression, if the spark plugs are working, the fuel-air mixture can still ignite, even if the fuel is not of high quality.

Low compression, thick engine oil, weak battery - all this makes it difficult to start the engine. The following happens:

• low quality fuel is supplied;
• the crankshaft rotates slowly due to engine oil thickened by frost, the battery is not charged enough;
• due to the fact that the engine is cold, the compression in it is lower than in a heated state;
• generation of a weak unstable spark.

In order to fill the spark plugs, you just need to try to start a car with a weak battery.

How to understand that the candles are flooded

First of all, you need to define the concept of “drenched candles”, that is, what is it? One of the main operating cycles of a gasoline internal combustion engine is the supply of a fuel-air mixture to the combustion chamber and its subsequent ignition. When, for some reason, the spark plug does not light it, this is called “flooding the spark plugs.”

And all because a large amount of fuel gets into the electrodes and the spark plug body. And the more fuel that gets there, the more difficult it is to ignite it, although in practice this is almost impossible until they are dried.

Most often this happens during the cold season, during significant frosts or simply during cold snaps. As drivers say, “in the cold.” During such a period, there is a heavy load on the battery and if it is weak, then there is always the possibility of flooding the spark plugs. That is, the driver tries to start the car two or three times, while the battery is discharged and the spark plugs are filled with gasoline.

However, spark plugs can be filled with more than just gasoline. two other process fluids can get on it - engine oil and coolant (antifreeze or antifreeze).

Indirect signs that the spark plugs are filled with engine oil are the following situations:

• rapid decrease in oil level in the engine crankcase;
• Unstable engine starting, and at any time of the year;
• decrease in the dynamic characteristics of the car, poor acceleration, drop in power;
• Unstable engine operation at idle speed;
• "triple" of the engine.

It is necessary to understand that the listed signs may indicate other breakdowns in the engine, so it is better to unscrew the spark plug/s from its seat and visually assess the condition of its electrodes and insulator. Moreover, it is advisable to check both for the presence of burnt oil and for the general condition. Much can be understood by color.

Similar signs will indicate that the spark plug is filled with coolant (antifreeze). In this case, there will also be a drop in engine power, a rapid drop in the coolant level, and the appearance of white carbon deposits on the spark plug electrodes and/or its insulator. You may also notice the appearance of white smoke from the exhaust pipe.

The main reasons for poor starting

The list of reasons why a cold engine is difficult to start is quite wide. Before starting diagnostics, it is necessary to more accurately localize the fault. Make sure the battery is charged and the starter turns the engine smoothly (at the same speed). Additionally, it is worth excluding the possibility of refueling with low-grade gasoline.

Fuel supply

Problems with starting the engine can arise both as a result of the fact that there is no fuel supply, and due to failures in the process of its ignition in the engine cylinders. As for the fuel supply, there may be too little fuel to start. It is also possible that the spark plugs are flooded with excess fuel.

1. It's worth starting the check by making sure there is an exhaust. If light smoke appears from the exhaust pipe after turning the starter, then this indicates that there is fuel supply to the cylinders.
2. The next step is to remove the spark plugs. The spark plugs must be unscrewed after an unsuccessful attempt to start the engine. If the spark plug is flooded with gasoline, then this can often indicate problems with injector sealing or ignition. Check the integrity of the spark plugs themselves and the high-voltage wires, and also make sure that there is a spark at the spark plugs. A dry spark plug will indicate that fuel is not being supplied to the cylinder.
3. Clogged coarse and fine filters, as well as faulty or heavily coked injection nozzles, can also hinder the normal supply of fuel to the engine. Fuel may also not enter the engine due to a sharp decrease in the performance of the fuel pump. This means that the fuel pump is not creating the required pressure. To find out the reasons, you will need to check the fuel pressure in the rail and the fuel pump itself.

Electronic sensors

The electronic injection system is equipped with special sensors, thanks to which interaction with the engine ECU is realized. Failure of individual electronic components can result in incorrect signals being sent to the control unit and the engine cannot be started.

If the engine does not start, then you need to check several sensors:

Ignition check

The engine may not start if the ignition distributor is faulty. This malfunction manifests itself in such a way that when the starter rotates, the so-called seizure does not occur, that is, there are no signs of single attempts to ignite the fuel-air mixture in the engine cylinders.

It is also worth paying attention to the setting of the ignition timing, timing belt and its drive. In some cases, it is worth checking the condition of the variable valve timing system (if equipped)

The ignition coil can be checked using a multimeter.

Compression reduction

A loss of compression in one or more engine cylinders is a consequence of natural wear or damage to the power unit. A motor with low compression does not, as there is a strong increase in the gaps between the parts in the cylinder. In other words, it is not possible to achieve the required pressure in the combustion chamber to ignite the working mixture at the time of start-up.

Frequent causes of this malfunction may be piston destruction, broken or stuck piston rings, burnout of the timing valve, wear of the cylinder walls, etc. Low compression most often appears during a cold start, but can also be present constantly (when trying to start a very worn engine “hot”). An engine with such a malfunction is most difficult to start at low temperatures. For an accurate diagnosis, compression must be measured.

Why does the starter turn normally, but the engine does not catch and does not start? Main causes of malfunction, checking fuel supply and ignition systems. Adviсe.

Why the engine may not start at low temperatures: possible causes and malfunctions. How to properly start a frozen engine after parking.

Why spark plugs flood on injection and carburetor engines: the main reasons for wet spark plugs. How to dry spark plugs and start the engine, tips.

Why does the engine smoke black after starting? Causes of white smoke or blue exhaust gases. Diagnostics of faults, recommendations.

Causes of difficult “cold” starting of a diesel engine. Compression, glow plugs, diesel injectors, injection pump, paraffin or water in the fuel system.

Starting a diesel engine in winter. Antigel additives for diesel fuel, kerosene and replacing the fuel filter. Heating of the fuel tank, glow plugs, battery.

What does the color of soot deposits indicate?

Using a color shade, you can quickly understand what problem areas are in the engine of your car. However, simply replacing samples will not solve the cause of soot - new spark plugs will very quickly become unusable. Currently, there are 3 main colors of deposits in the ignition system:

Each of the colors presented indicates the occurrence of a specific malfunction or group of problems in the car’s engine.

The appearance of black soot

This plaque can be either dry or oily. The appearance of a black coating in dry form indicates that an enriched mixture is being supplied to the engine. Candles become covered with such soot as a result of:

• Incorrect operation of carburetor systems;
• Clogged air filters;
• High pressure at the stage of fuel supply to the fuel rail;
• Little spark energy;
• Weak compression.

If black oily deposits appear, it is necessary to check the possibility of oil getting into the combustible fuel mixture itself. As a rule, oil leaks as a result of wear of the oil scraper type piston ring set. In addition, the cause of oil deposits can be damage to the valve system caps.

Advice: if you have recently repaired a VAZ-2114 generator, be sure to check the spark plugs. Perhaps some of the problems with the car lie there.

The appearance of white soot

White deposits in the ignition system can have several color shades:

• Slightly ashy colored deposits. Appear as a result of engine operation on low-quality gasoline samples. To solve the problem, you just need to remove and wipe the spark plug rings, after which they will become suitable for use again.
• Shiny white soot. Indicates the appearance of erosion on the body of the contact electrodes. It occurs as a result of overheating of the ignition system, and the cause may also lie in an insufficiently enriched fuel mixture. In addition, problems with early ignition and breakdowns in the cooling system can give such a tint. If the deposits are shiny white, it is best to replace the entire set.

Tip: if the spark appears weakly, a situation may occur when the car jerks when you press the gas pedal. This is also a common cause of a faulty spark plug set.

The appearance of brown or red soot

If red/brown deposits appear, you need to diagnose the fuel mixture entering the engine. Often this situation occurs when a large number of special additives are introduced into the car oil, which flush the engine cooling system. Also, the brown color on the spark plugs indicates that the engine has been running for a long time on a type of leaded gasoline.

As a result of the appearance of a brown conductive coating on the surface of the insulator, you will find disturbances in the normal formation of sparks. The car may not start for a long time and run intermittently at high speeds. To fix the problem, just clean the fuel system by adding new gasoline.

Tip: if there is no spark in the spark plugs, pay attention to the gaps in the electrodes. Perhaps they are covered with carbon deposits. To solve the problem, simply cleaning the spark plugs is not enough - you will need to replace the entire set, since if the situation repeats, problems will arise in the engine.

What are they doing to prevent this from happening?

The most important thing in this case is to ensure the proper technical condition of the engine systems

First of all, pay attention to the condition of the battery. Topping up with distilled water doesn't end there.

It should be charged and the charge level checked regularly. For areas with low temperatures in winter, the use of insulated battery covers is recommended. They can be purchased at automotive stores or made yourself. In very severe frosts, it is best to remove the battery from the car and bring it into a warm room.

Battery cover to keep the battery charged in cold weather.

The starter must be in perfect condition. If there are problems in it, then even with a fully charged battery it is impossible to start the engine. The battery's energy will be taken by a faulty starter, so it will not be enough to produce a high-quality spark.

On used injection engines, you need to regularly clean the injectors. Experts do not recommend performing surgery using additives added to gasoline. The desired effect is obtained after using the appropriate equipment, which some craftsmen make themselves.

Finally, I would like to give advice from experienced drivers. Periodically clean the spark plugs by driving at high speeds. It is enough to drive a certain distance at a speed of 110-120 km/h for self-cleaning to occur.

What to do to prevent candles from flooding

We have looked at the reasons why the spark plugs on the injector are flooded. Now we need to figure out what to do in order to forget about the fact that gasoline floods the candles in cold weather. To do this, a number of preventative measures should be taken before frosts begin.

First of all, you need to monitor the battery charge level. In winter, it is better to equip your car with more powerful batteries. To prevent fuel from flooding the injector, the battery must be maximally charged. Therefore, if necessary, it must be recharged at night.

With the onset of cold weather, special attention should be paid to the quality of gasoline and oil. You shouldn’t skimp on this and it’s better to purchase only a high-quality product that suits the season.

Naturally, you need to monitor the serviceability of the spark plugs.

Clean them regularly and change them on time if they are faulty. The piston group also requires attention. It is responsible for creating compression, so when it wears out, the necessary pressure to ignite the air-gasoline mixture will not be achieved and fuel floods the spark plugs on the injector.

If it is frosty outside, then when starting the engine it is recommended to first load the battery. Then turn it off for a few minutes. Crank the starter and start the engine. If the launch is unsuccessful, then you need to wait about 10-15 minutes so as not to flood the injector, and repeat the launch. It is necessary to check the serviceability of the car before the onset of cold weather. If all components work properly, then there will be no problems starting the engine.

To summarize, the following conditions can be identified for optimal injector operation:

• the starter must be in working condition;
• the battery is fully charged;
• the lubricating fluid must correspond to the season;
• all high voltage wires and spark plugs must be in good condition;
• nozzles must be adjusted and kept clean;
• use only high-quality fuel.

To self-clean the engine, experienced car enthusiasts recommend going out on the highway every month and driving the car at a speed of 120 km/h.

Self-cleaning of the engine occurs due to strong pressure. You can clean the engine by running it in the morning at five thousand rpm for 10 minutes. The effect is similar to driving along a highway.

Monitor the condition of your car, then you will avoid unpleasant situations and save your nerves.

Possible solutions to the problem of flooded candles

The manufacturing plant has already foreseen the situation in which the spark plugs splash, and VAZ, for example, has the corresponding instructions in its passport. Basic recommendations for actions if fuel gets on the spark plug, which is called “cold”:

1. Remove the candles.
2. Crank the starter for 15 minutes without spark plugs.
3. Wipe and dry the spark plugs well, then install them in their original place.

There is an alternative, so-called “folk” method. It must be applied even before the spark plugs are removed:

1. Press the gas pedal all the way.
2. Crank the starter for 10 -15 seconds.
3. Return the pedal to its place.

Since at this moment there is no supply of fuel mixture, the spark plugs are purged and dried with air. If all else fails, remove the wet spark plugs and dry them thoroughly. Depending on the conditions, you can dry it over any heat source - fire, gas stove, hairdryer.

Injection and carburetor spark plugs are practically the same, so the methods used can be used in both cases. If the spark plugs on the injector are flooded in the warm season, diagnostics of the fuel system and the sparking mechanism is necessary. If necessary, it is necessary to replace faulty components. At the same time, the condition of the injectors is checked, as well as the functionality of the Hall sensor.

The main reasons why spark plugs flood lie in non-compliance with the terms of preventive maintenance and technical regulations. Prevention can significantly increase the period of trouble-free operation of vehicle components. Therefore, even before the onset of frost, a number of preventive measures should be carried out:

Constantly monitor the condition of the battery. In winter, it is generally better to install a battery with a higher capacity than was used in the warm season. With a powerful battery, a number of reasons for allowing fuel to flood the spark plugs disappear

It is best to recharge the battery at night, but in compliance with fire safety rules; During cold weather, increased attention must be paid to engine oil, and high-quality gasoline should also be filled, without contaminants. Consumable lubricants must be appropriate for the season; You must constantly monitor the condition of the spark plugs

It is necessary to regularly unscrew the spark plugs, remove carbon deposits from them, clean and adjust the gap. If technical characteristics deteriorate, it is best to replace the spark plugs.

What does the appearance of carbon deposits on candles indicate?

By examining the appearance of the removed spark plugs, a specialist can easily determine the current condition of the main power units, as well as malfunctions in the operation of the vehicle’s auxiliary components and systems.

Depending on the color and degree of carbon deposits observed on the spark plug, auto mechanics accurately determine the diagnosis of the engine. At the same time, an understanding is formed - the engine operates primarily on a rich or lean fuel mixture. Also, a different color shade of soot on a set of spark plugs indicates specific reasons for poor engine performance.

The main malfunctions include:

1. Change for the worse in the quality of the air-fuel mixture that forms carbon deposits.
2. The quality of the system that is installed by the injector program.
3. Problems appearing in the carburetor settings. The result is an overflow of fuel when the pump is running and the formation of black carbon marks on the spark plugs.
4. Sudden wear of spare parts of the ignition system.
5. Problems with ignition control. Changing the advance angle, which, in turn, affects the timely appearance of the spark and the possibility of engine detonation.
6. Acceleration of wear in valve system seals. Characterized by the appearance of a black coating on the skirt.
7. Wear before the expiration date of cylinder-piston groups, which, in turn, increases deposits in the form of carbon deposits.
8. Significant wear of the ellipse in the block, the set of piston rings and the piston design itself.

Advice: in order to see the reason for poor engine performance, you don’t always need to go to a car service center. First, remove the set of spark plugs from the cylinder block and look at the color of the carbon deposits that appear. The indicator symbols on the instrument panel will also indicate problems with the engine.

Causes of oil on spark plugs

If the candles are covered with oil, then first of all it is necessary to determine exactly which part has the most of it. Many car owners are faced with a situation where only the threads and body are coated with lubricant, while the electrodes are dry and have a normal color (light brown). But it also happens that the entire base ends up in oil.

At the same time, in addition to traces of lubricant on the spark plugs, a malfunction with the engine manifests itself in other ways - deterioration in dynamics, increased exhaust smoke, oil burns. In order for it not to be the cause, it must be eliminated.

Most often, the appearance of grease marks occurs due to wear and damage:

Candles flooded with oil - cause and solution. photo report

Candles flooded with oil - cause and solution. (photo report)

Post by Dron9l » Mar 22, 2012, 11:55 pm

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution.

Post by Dron9l » Mar 22, 2012, 11:59 pm

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Message from Pilots » March 23, 2012, 00:57

Re: Spark plugs filled with oil, cause and solution. (photo report

Message from Pilots » March 23, 2012, 01:03

Re: Spark plugs filled with oil, cause and solution. (photo report

Message from Pilots » March 23, 2012, 01:03

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 23, 2012 01:47

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by fatez » Mar 23, 2012 09:35

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 23, 2012, 11:13 am

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by motorist » Mar 23, 2012, 02:23 pm

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by SAILOR » March 23, 2012, 2:30 p.m.

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 23, 2012 6:39 pm

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by TAPEH » Mar 23, 2012, 11:44 pm

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 23, 2012, 11:54 pm

Thank you! I'll be doing a cylinder compression test soon! There will also be a photo report with all the details.

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by TAPEH » Mar 24, 2012 12:23 pm

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 24, 2012 3:25 pm

Before replacing the valve cover gasket (oil was leaking into the spark plug wells), I also measured 16 kg per cylinder! But I suspect that this is too big, and this happened due to the presence of oil in the cylinders (perhaps it got into the cylinders through the wells)! Now the gasket (replaced) will break in and I will again check the presence of oil and measure the compression. I’ll post there to see if the compression has changed! and I’ll make a photo report as promised!

You didn't have any oil in the cylinders when you checked the compression. Did they turn off your fuel pump too?? since the pressure there is normal - and compression can lie.

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 24, 2012 03:31 pm

Yes, but your oil consumption per 1000 km - a liter - is too much. Based on this consumption, I can assume that your piston rings may be worn out - hence the high pressure in the cylinders (“oil compression”)!! When your car runs on a cold start, is the exhaust not bluish (bluish) in color? and when you give the gas on a cold start, there is no pronounced blue haze. It’s possible that the valves can also be fooling!

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dis5 » Mar 24, 2012, 11:44 pm

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 25, 2012 08:55

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Lars » Mar 25, 2012, 03:11 pm

Re: Spark plugs filled with oil, cause and solution. (photo report

Post by Dron9l » Mar 25, 2012 04:14 pm

77,000 km mileage, manual gearbox, red metallic, maximum specification - adaptive xenon is simply super. ))

Why does fuel flood the spark plugs in the injector?

If the spark plugs are flooded, then among the reasons, the condition of the piston system should be put in first place, because with ideal compression, the engine should start even with minimal spark values. However, only a new car can have such compression, while a used car already has some wear and tear. After only three years of operation, a VAZ car begins to suffer from this disease when fuel enters the injector.

It is typical that fuel can get onto the spark plugs in winter even in serviceable cars as a result of the system’s interaction with cold air. But in the summer, this problem in the vast majority of cases occurs if something is wrong with the car. The ignition control unit malfunctions - when a command is given to increase the fuel in the injectors, the fuel supplied in a large volume does not have time to ignite, hence wet spark plugs and other troubles. This applies to injection engines; for carburetor cars, in the absence of an ECU unit, this situation arises due to insufficient compression, and this directly depends on the condition of the piston group.

It is worth mentioning another problem when the spark plugs are stained with oil and the engine operation is inconsistent. There is an increased waste of expensive oil, problems with idling and “triple” of the engine. Among the reasons, we can name, first of all, the same wear of the piston group, increased oil pressure in the crankcase, failure of the valve stem seals and cuffs.

Seven reasons to fill candles when cold

If you decided to start the engine, but nothing happened, and instead you found spark plugs stained with gasoline, then this could happen for the following reasons:

1. Insufficiently charged battery. Even if at positive temperatures the battery coped with its tasks without problems, the onset of frost could radically change the situation. It is enough for the battery to be discharged by 50%. Even with this indicator, there may not be enough power to start the engine.

2. Cylinder wear. A worn-out engine cannot run perfectly, so it is not surprising that new engines have insufficient cylinder compression. In combination with other factors, this can lead to flooded candles.

Compression measurement

3. Old spark plugs. It is not for nothing that this part is consumable and requires regular monitoring and, if necessary, replacement. If you do not change the spark plugs for a long time, then defects appear on them, which can prevent spark formation, which is so necessary to start the engine.

4. Malfunction of structural elements of the ignition system. Faulty wires and soured contacts can be one of the reasons that caused spark plugs to flood.

5. Poor quality fuel. This does not mean that you were deceived and sold bad gasoline. The point is that in winter there are a number of factors that can negatively affect the quality of fuel.

For example, the formation of condensation in the fuel tank and its entry into gasoline. As a result, the fuel does not ignite at the right time, which becomes one of the reasons for “wet” spark plugs.

6. Unsuitable engine oil. If we are talking about winter, then you need to use oil with a viscosity that will not load the engine, otherwise this will become another factor creating conditions for flooding.

7. Accumulation of carbon deposits in the combustion chamber. Short trips in the city do not allow the engine to “breathe”. As a result, carbon deposits form, which settles in a thick layer on the walls of the combustion chamber. The mobility of the piston rings decreases, and with it the compression in the cylinders. As a preventative measure, it is necessary to run the engine at high speeds. Sometimes, to return the piston rings to mobility, special flushing of the system is required.

Carbon deposits in the combustion chamber

Sometimes it happens that there is a spark and the starter rotates normally, but gasoline still pours out. In this case, it is necessary to carry out diagnostics to determine the serviceability of the spark plugs. In rare cases, the problem may be in the ECU itself.

Possible causes of malfunction

The reason for this trouble could be:

1. The spark plugs failed because they had outlived their useful life. It is recommended to change this consumable part after approximately 7-10 thousand kilometers traveled. If this was not done, then it’s time to buy new ones and the problem will disappear.
2. Wear of the cylinders, in this case, compression drops and the engine stops working normally, which also leads to spark plug flooding.

Measuring with a compression meter will help you verify this version.

1. Low battery. When temperatures change, there is a possibility of loss of charge, and a lack of power leads to the engine refusing to start, as a result of which the spark plugs may flood.
2. Soured wires or contacts connecting structural elements. If such a malfunction is detected, it is recommended to clean them with a special liquid or replace them.

3. Condensation in the gas tank. This is also a common problem that motorists face during the winter season. The accumulated condensate mixes with gasoline, and this prevents it from igniting when necessary.

You can prevent this type of problem by purchasing a fuel additive and using it following the instructions.

1. The consistency of the oil is not suitable for the cold season.

Important. Before the onset of cold weather, change the engine oil to a higher quality one. It will not thicken in the cold and interfere with the full operation of the engine.

1. Carbon deposits in the engine. The driver needs to remember how long ago the engine was cleaned from carbon deposits. Possibly accumulated dirt deposited in thick layers in the combustion chamber reduces the mobility of the piston rings, which can lead to disruption of the process and serve as a reason for filling.

Fuel supply and sparking process

When negative temperatures set in, the fuel mixture becomes insufficiently saturated with air; this occurs as a result of an increase in oxygen in the air during frost. Increased oxygen concentration requires increased fuel supply. If the electronic control is in order, then the corresponding command is sent to the injectors and the fuel supply is normalized in accordance with the temperature regime.

When starting, the starter creates compression in the cylinders while simultaneously producing a spark at the spark plug. As a result, the fuel mixture ignites and the engine performs a power stroke.

If the compression is weak and sparking is insufficient, the fuel mixture does not have time to ignite and simply gets on the spark plugs, then starting the car becomes problematic.

Factors influencing normal sparking:

• quality of the fuel mixture. The presence of dirt and large amounts of impurities negatively affects the functioning of the injectors. They simply become clogged with dirty fuel;
• engine condition. Wear of the pistons does not make it possible to create the necessary pressure in the combustion chamber, so fuel, not finding an outlet, begins to flood the injector;
• non-standard or low-quality candles;
• condition of the carburetor and injector;
• battery charge state. A dead battery cannot crank the starter.

Causes of the problem

Even if the engine was able to start, the problem will occur again. If this is not the first time a spark plug on a scooter has been flooded, it’s worth finding and fixing the problem. The culprit could be:

• Dirty air filter. If there is not enough oxygen in the fuel mixture, the gasoline will not burn completely and will remain on the spark plug.
• Mixture quality screw. If the carburetor is not adjusted correctly and the screw is too tight, a similar problem will occur.
• Poor quality fuel. Gasoline diluted with another liquid can also cause this.
• Defect in the ignition system itself. There is no spark, or it is not powerful enough to ignite the mixture.
• Low battery. On days when the temperature drops below zero, you need to make sure that the battery is well charged, otherwise a similar problem will arise.

Flooded candle

Sometimes, if a candle is wet, it is enough to simply dry it. But this will not eliminate the problem and will not prevent this unpleasant situation from occurring in the future. While almost any of the problems described can be dealt with on your own.

Causes of the problem and a set of solutions

If the spark plugs are actually filled with gasoline when starting the engine, then you need to check how well the spark is being formed in the engine. You may have to unscrew each of the spark plugs sequentially, after first removing the high-voltage connectors. The ignition must be turned off. It is advisable to disconnect one of the battery terminals too.

Use a spanner for dismantling

What to check:

• There should be no carbon deposits on the spark plug contacts;
• The distance between the contacts must correspond to the “passport value”.

The bad news is that the cause of unstable spark formation can be poor quality wiring or any malfunction in the ignition control system. Sometimes finding the causes takes longer than eliminating the defect. In such cases, it is difficult to do without the help of professionals. Don't overestimate your strength.

By the way, you can try to reason logically. The controller regulates the concentration of the mixture based on air temperature values. And these values ​​are determined according to the readings of a single sensor - DTOZH.

Any temperature sensor is a thermistor

We are, of course, talking about the coolant temperature sensor.

Note that in modern engines, to calculate the mixture concentration, not one temperature sensor is used, but several. An air heating sensor installed in the intake manifold can also be used. But the presence of engine oil in the manifold is not uncommon. And imagine what will happen if liquid gets on the body of such a sensor.

Prevention is the best way to prevent candles from flooding

To prevent the spark plugs from flooding, you need to maintain your car properly.

• charged battery;
• good condition of high-voltage wires;
• serviceable ignition coils;
• clean injector nozzles;
• MAP sensor or mass air flow sensor is working properly;
• clean fuel filter.

If your car regularly does not start

Because the spark plugs are flooded, the reason should be sought not in the spark plugs themselves, but in the computer, wiring or sensors.

In the event that the car is flooded with 1 or 2 spark plugs

, and the rest of the spark plugs are fine, the problem may be in the injectors which, due to their poor performance, are unable to fill the rest of the spark plugs or the computer.

It's better to warm up your car in winter

, having spent a liter of gasoline overnight, rather than unscrew flooded spark plugs in the cold, wasting your nerves and time.

Why is oil harmful to spark plugs?

To answer the question of why oil in spark plug wells is harmful, we again need to turn to the purpose of the candle - ignition. Once you connect the logic, it becomes clear that high-quality ignition is not possible in conditions of high liquid content.

Prolonged exposure of a spark plug to an oil environment is fraught with the formation of a spark plug insulator, which will lead to its incapacity. As a result, the candles will break through.

In addition to the lack of balanced engine operation, which will constantly make itself felt (the engine will inevitably start to trip), one should not forget about the increase in oil appetite. Of course, thanks to its design features, the Grant engine already has a good appetite in terms of oil, but if its consumption has increased, check the spark plugs.

By the way, the norm is consumption of up to 400 grams per 1000 km. The more active the driving style, the higher the indicator.