Chevrolet Niva starts and stalls

Why does the Chevrolet Niva start and immediately stall when it’s cold?

The Chevrolet Niva received an injection engine that was progressive for those times, and with it a whole list of injection problems. The fact is that any engine with an injection power system is controlled 90% by electronics - sensors, controllers, processors. And these elements require a very high-quality elementary base, fine tuning and special care during assembly. If a Chevrolet Niva starts and stalls when cold, there is a possibility that the control electronics system has failed.

What to do if the engine doesn’t start well when it’s hot?

Note that the symptoms of problematic engine starting manifest themselves in different ways. Some cars refuse to start at all until the power plant has completely cooled down. Others start on the third or fourth try, and some motors have to be cranked for 20-30 seconds to fully start.

What to do in this case? You need to look for the problem and fix the malfunction, replace a poorly functioning internal combustion engine element or repair it. Note that such a malfunction may be a harbinger of more serious breakdowns, so it is better to solve it at an early stage.

Chevrolet Niva starts and stalls when cold, what should I do?

Perhaps the reason should be looked under the hood?

After a long period of parking, the engine starts, runs for a few seconds, and then stalls. There may be several reasons for such a malfunction, but let’s imagine that the diagnostic station is 300 km away from us, and we need to find the cause. We proceed as follows.

Looking at the candles

When using spark plugs with cracks, current leaks through the insulator to the spark plug body.

We unscrew the spark plugs and assess their condition.

If the spark plugs are flooded or wet, then there is a possibility that the idle speed sensor did not turn on, the throttle unit sent the wrong signal to the ECU, which in turn sent too much fuel through the injectors.

In addition, a common culprit for a malfunction with such symptoms is the throttle position sensor. With a high degree of probability, the spark plugs could fail.

Listening to the fuel pump

Niva Chevrolet fuel pump under the seat.

Turn on the ignition and listen to see if the fuel pump is working.

There is a possibility that fuel is not supplied to the ramp, and the engine flared only due to the remaining gasoline in the fuel line.

If this version is confirmed, then the engine will no longer start, the fuel pump needs to be repaired, the fine filter or mesh, or the coarse filter on the fuel pump itself must be replaced.

Looking for an air leak

You should look for air leaks under the hood.

Air leaks in the power system can also cause a similar malfunction. A mixture that is too lean at startup will prevent the engine from running after a flash.

To verify this in field or garage conditions, just cover the air intake pipe of the air filter.

Often, air leaks can occur between the filter housing and the throttle assembly; sometimes excess air can enter through the junction of the intake manifold and the block head.

Cleaning the XX regulator

Old idle air control on a Niva Chevrolet.

Idle speed regulator . Considering the quality of our 92 gasoline, dirty IAC is not that uncommon.

If, after trying to start again, the car starts, but the speed fluctuates within the range of 1500–2000 rpm, you can safely remove the idle speed control, clean it or change it.

The regulator will also manifest itself in motion, when the car is coasting, the engine may stall or stall frequently, there may be no idle speed at all if the regulator is faulty or completely coked.

We control the MAF (Mass Air Flow Sensor)

Checking the operation of the mass air flow sensor.

For reference, at idle speed the Niva Chevrolet engine consumes about 17–19 kg of air , at 3 thousand revolutions - about 35 kg .

If the mass air flow sensor sends incorrect data to the electronic engine control unit, then the fuel supply changes accordingly, according to the data of this sensor. For example, a faulty mass air flow sensor sends data about 40 kg of air at idle, the ECU adjusts the fuel supply, as a result of which we again have flooded spark plugs and the engine refuses to work after starting without a throttle valve.

One of the most obvious symptoms of air flow meter failure is increased fuel consumption, whether at idle, at medium speeds, or under load.

Chevrolet Niva starts and stalls

Chevrolet Niva starts and stalls when cold, what should I do?

Perhaps the reason should be looked under the hood?

Looking at the candles

When using spark plugs with cracks, current leaks through the insulator to the spark plug body.

We unscrew the spark plugs and assess their condition.

If the spark plugs are flooded or wet, then there is a possibility that the idle speed sensor did not turn on, the throttle unit sent the wrong signal to the ECU, which in turn sent too much fuel through the injectors.

In addition, a common culprit for a malfunction with such symptoms is the throttle position sensor. With a high degree of probability, the spark plugs could fail.

Listening to the fuel pump

Niva Chevrolet fuel pump under the seat.

Turn on the ignition and listen to see if the fuel pump is working.

There is a possibility that fuel is not supplied to the ramp, and the engine flared only due to the remaining gasoline in the fuel line.

If this version is confirmed, then the engine will no longer start, the fuel pump needs to be repaired, the fine filter or mesh, or the coarse filter on the fuel pump itself must be replaced.

Looking for an air leak

You should look for air leaks under the hood.

Air leaks in the power system can also cause a similar malfunction. A mixture that is too lean at startup will prevent the engine from running after a flash.

To verify this in field or garage conditions, just cover the air intake pipe of the air filter.

Often, air leaks can occur between the filter housing and the throttle assembly; sometimes excess air can enter through the junction of the intake manifold and the block head.

Cleaning the XX regulator

Old idle air control on a Niva Chevrolet.

Idle speed regulator . Considering the quality of our 92 gasoline, dirty IAC is not that uncommon.

If, after trying to start again, the car starts, but the speed fluctuates within the range of 1500–2000 rpm, you can safely remove the idle speed control, clean it or change it.

We control the MAF (Mass Air Flow Sensor)

Checking the operation of the mass air flow sensor.

Spark plug

Problems arise due to the lack of a spark, and may arise due to the appearance of soot and dirt, which prevents the formation of a spark. If there is this deposit or dirt on the contacts, then it is advisable to change the fuel to a higher quality one, and you should also check the condition of the oil supply system, since a malfunction of the sensor that regulates the oil supply leads to the spark plugs splashing. Also, the appearance of oil indicates that there are problems in the cylinders. Therefore, if you see the presence of all the above phenomena, then it is advisable to diagnose the engine in a car service center, and if the reasons for their occurrence are not eliminated in time, this can lead to an expensive replacement of pistons with jet thrusts.

If you systematically use low-quality fuel, a brown coating appears on the spark plugs, and simple cleaning will not help, so it is better to make a complete replacement.

Electricity supply

If the engine turns off while driving, but it is not difficult to start it, then the problem is most likely a faulty power supply. Problems can be caused by several reasons:

The battery terminals have poor contact
There is a breakdown along the entire length of the power wires
There is a malfunction in the ignition coil system or generator

If the wires are damp, it is better to replace them along with the battery. If the terminals have poor contact, they need to be cleaned. If the generator does not work, this may be due to the fact that the timing belt has broken or there is a malfunction inside the generator itself. A problem with the generator on a Chevrolet Niva is easily determined using the indicator on the dashboard. In addition, if the energy supply is insufficient, the backlight of the car’s dashboard will be weak, and the sensor values will be incorrect.

Why does the Niva stall at idle (main reasons)

The Niva stalled immediately after starting, why?

Almost always, if a Niva car does not idle and stalls, the reason for this is contamination of parts, for example:

The throttle valve, injector or carburetor is clogged.
The idle relay has failed.
The idle jets are dirty.
The fuel pump is dirty.
The engine ventilation system is clogged.

The car stalls after turning off the starter

A dirty throttle valve is to blame!

It happens that the car does not want to slow down the engine speed when you release the gas pedal or stalls at idle. Basically, the problem here lies in a clogged throttle valve. It might just jam.

This problem can happen if you constantly drive on low-quality gasoline. The damper can become clogged when contaminated air enters.

The problem can be corrected by cleaning the damper . To do this, you need to use a regular carburetor cleaner. It is sold in the store.

You should also pay attention to the clogging of the oil trap in the engine crankcase. In this case, the engine will suffocate from excess gases from the crankcase. As a result, it will not hold idle speed and stall. To eliminate the problem, you should regularly wash the crankcase ventilation filter.

The engine stalls immediately, but then starts

Idle speed regulator.

Here the reason may be in the firmware of the electronic engine control unit. The reason for this may be improperly performed tuning of the power unit. In this case, the engine will operate stably only at high speeds. If they drop below 1,000 rpm, the engine will simply stall. This malfunction can be eliminated by flashing the unit to the factory version of the program.

You should also pay attention to all kinds of sensors in car systems. These are, for example, the idle speed control, the throttle position sensor and others. They need to be checked at stands.

The carburetor is Niva’s problem

Inspection and disassembly of the carburetor.

If a carburetor , then in 4 cases out of 5 it can be the cause of unstable engine operation. The most common problem is that the carburetor is clogged. Although this unit is considered reliable in a car, it should also be cleaned periodically. It must be washed using special solvents that are sold in the store.

Carburetor contamination

The main enemy of the carburetor is low-quality fuel . Dirt and moisture can also get there from the tank. Therefore, it is recommended to regularly change the fuel filter, which is installed in front of the carburetor.

The fuel pump should be cleaned periodically. A mesh is installed on it, which traps debris.

Poor quality or old hoses through which fuel enters the tank are another reason for carburetor clogging. Such parts need to be changed every 10–15 years.

Fuel jet

It should be checked when the car stalls at idle. To check, you need to turn on the ignition and reset the wire from the EMC and reconnect it. A click should be heard. When it is not there, you should check whether voltage is supplied to it. In some cases, you will have to completely replace the part.

Fuel supply

It is very easy to understand that the reason that the car stalls due to choking of the fuel mixture is that if you drive for a long time, the signal that is responsible for this function will begin to constantly turn on. This problem is associated with low quality fuel, since the spark from the candles is not enough to quickly ignite it. Another reason that the Chevrolet Niva stalls may be:

Dirt in the fuel filter
Injector nozzles are faulty
Dirty throttle valve

There are minor interruptions in the power supply to the fuel pump

The presence of these problems leads to the fact that the engine power decreases and it begins to stall.

Air lock in the fuel line of Niva Chevrolet

There is a control fitting 3 on the ramp with regulator 5. The latter is hidden by a cap; you need to unscrew it and carefully press the spool. Fuel poured out - therefore, it entered the ramp. However, it is possible that the required pressure is not generated. The reasons may be clogged filter cylinder, damage to the pump, etc.

The pressure must show 350 kPa, that is, 3.5 bar. To control it, unscrew the spool and then install a pressure gauge. On the eve of the test, you should reduce your blood pressure. If there is no fuel supply, you need to pay attention to whether the pump turns on or not when turning the key to the “I” mark. When cold, the pump should operate for 10 seconds with the engine running.

The intake of air into the fuel circuit from the outside creates plugs, as a result of which the fuel mixture does not burn in full. A copious amount of carbon deposits is formed, which settles inside the exhaust system and exhaust manifold.

Exhaust system

If the tubes that remove gas fail, this leads to the fact that the car begins to choke while driving, stopping the engine completely. The problem usually occurs for two reasons:

The muffler is clogged
Catalyst faulty

If these problems occur, you should clean the muffler, check the catalyst and, if necessary, replace it.

It is important to pay attention to the prompts that the on-board computer gives; if there are errors in a particular system, they should be corrected immediately. If these problems are minor and mechanical in nature, then you can fix them yourself, but if the failure is related to electronics, then it is better to carry out diagnostics in a specialized car service center.

Spark plug

If you systematically use low-quality fuel, a brown coating appears on the spark plugs, and simple cleaning will not help, so it is better to make a complete replacement.

Electricity supply

If the engine turns off while driving, but it is not difficult to start it, then the problem is most likely a faulty power supply. Problems can be caused by several reasons:

The battery terminals have poor contact
There is a breakdown along the entire length of the power wires
There is a malfunction in the ignition coil system or generator

Fuel supply

Dirt in the fuel filter
Injector nozzles are faulty
Dirty throttle valve

There are minor interruptions in the power supply to the fuel pump

The presence of these problems leads to the fact that the engine power decreases and it begins to stall.

Chevrolet Niva stalls at idle

Replacing the idle speed sensor on a Chevrolet Niva

Self-diagnosis Niva Chevrolet, replacing the idle speed sensor

The engine does not hold idle speed well or stalls. The injector

High, low, engine speeds fluctuate. Mass air flow sensor, DBP+DTV, Air leak. Troubles the engine 2h

The Chevrolet Niva has lost idle speed. The coolant temperature sensor is faulty.

Strange behavior of Niva. We diagnose the internal combustion engine.

The engine of a fuel-injected VAZ car stalls

The car stalls at idle. Video

idle speed disappears. stalls at traffic lights. in neutral. cause found

Stalls when cold. Injection engine. No singles

Hello! Niva Chevrolet 2005 does not work and will not start at idle. As soon as you press the gas halfway, the car seizes and the speed only rises to 500 rpm; when you release the gas, it immediately stalls. The engine seems to be running when it's running. Everything is there - the spark and injectors are working, compression is 10 everywhere. We checked the spark with a special one. The spark plug on my car is every other time, but on another car, also Niva 2004, it is constant and they changed the module in a circle - no difference. The brains are Bosch 7.0, the other one seems to have January. Connected to the computer, all sensors are fine. What could be the reason?!

Stalls at idle at temperatures above 90 degrees, Niva Chevrolet - 5 answers
What causes the idle speed of a warm engine to not drop? – 4 answers
RPM fluctuates in Niva Chevrolet - 3 answers
Idle failure on a cold Niva Chevrolet engine - 2 answers
Increased idle speed in Chevy Niva - 1 answer

Install a new coolant sensor! He gives a command to the brain when to give a spark, that is, it determines the top dead center. It’s not the same without him.

If, after starting the engine, the speed starts to wander, if, having reached 1500 rpm, the speed drops sharply to 500, and then the car stalls, then the problem is most likely in the throttle assembly. You can get it back to normal by adding a little gas. The norm is: after starting the engine, the revolutions reach 1500, then as it warms up they smoothly drop to 900. Work it and it returns to normal. Most likely the problem is in the throttle assembly. It needs to be disassembled and cleaned thoroughly. Also check the idle air control and throttle position sensor. Before removing the sensor and regulator, check their contacts. It may also be that the regulator is simply not set to the start position. This may be due to condensation or dirt, which ultimately caused poor contact.

See TPS and IAC. When you have to press the gas to start an injection machine, the IAC does not work 100%. When was the throttle valve last cleaned? Check the TPS with an ohms tester (as you can see in my questions - checking the TPS). How do you understand the spark every other time? Write!

And the timing marks are in place. It must be placed as it should be. And what kind of sensor?

Subscribe

to our channel in
Index.Zen
Even more useful tips in a convenient format

Why does the Niva stall at idle? Let's figure it out.

Exhaust system

If the tubes that remove gas fail, this leads to the fact that the car begins to choke while driving, stopping the engine completely. The problem usually occurs for two reasons:

The muffler is clogged
Catalyst faulty

If these problems occur, you should clean the muffler, check the catalyst and, if necessary, replace it.

Why does the Chevrolet Niva start and immediately stall when it’s cold?

It is better to visit an auto electrician to determine the root cause of the failure of the fuses. Ignition relay Replace with a new relay. Broken wire of the main components Having found out which wire is broken, you need to find out the reason why this happened. After that, install it in place.

Reasons why Niva 4x4 does not start (the starter does not turn)

Immobilizer Anti-theft system suffers from battery failure. There may be several reasons for such a malfunction, but let’s imagine that the diagnostic station is miles away from us and find the cause. We proceed as follows.

We look at the spark plugs When using spark plugs with cracks, current leaks through the insulator to the spark plug body. We unscrew the spark plugs and assess their condition. If the Chevrolet Niva spark plugs do not start well when they are cold or wet, then there is a possibility that the idle speed sensor did not turn on, the throttle unit sent the wrong signal to the ECU, which in turn supplied too much fuel through the injectors. In addition, a frequent culprit of Chevrolet Niva malfunctions is that it is difficult to start when cold; such symptoms are the throttle position sensor.

With a high degree of probability, the spark plugs could fail. Listening to the fuel pump Turn on the ignition and listen to see if the fuel pump is working. The battery voltage is within normal limits. The relay is checked with an ohmmeter or if it is overheated. Replace the starter solenoid relay. Burnt starter commutator, stuck brushes or severe wear. The starter does not turn or turns slowly.

With the starter removed, check the pressing force of the brushes to the commutator, their residual height, wear and tear. Chevrolet Niva does not start easily when cold. Repair the starter. If the commutator is severely worn, replace the starter. Break or short circuit in the starter armature winding. The starter does not rotate or rotates slowly. The serviceability of the winding is checked with an ohmmeter or by darkening of the insulation. Replace the starter. The starter spins, but the flywheel is motionless. Replace the clutch or starter. The ring gear rotates on the flywheel. The starter rotates, but the flywheel and crankshaft are motionless.

Chevrolet Niva engine does not start

Problems with starting a car engine can be divided into two main groups depending on the degree of engine heating.

Engine cold

From the moment the engine was turned off, at least 6 hours have passed at an outside air temperature of +20 °C and at least 3 hours at -20 °C; the oil temperature in the engine crankcase coincides with the ambient temperature. The techniques for starting an engine with a fuel injection system are the same at any outside temperature.

1. Open the hood by pulling the hood lock drive handle towards you.

2. Using an oil dipstick, measure the oil level. It should be between the “MAX” and “MIN” marks.

3. Check the brake level.

4. . and coolants.

5. Carefully inspect the engine and engine compartment. Pay attention to leaks of gasoline, oil, brake and coolant. Make sure the electrical wiring is intact. Check the fit of the high-voltage wires into the ignition module sockets and onto the spark plugs.

6. Turn on the ignition by turning the key in the ignition switch to position “I”. The electric fuel pump will turn on. Without closing the hood (close the hood in case of rain or snow), get behind the wheel. Start the engine.

USEFUL ADVICE It is better to close the hood after the engine starts running. Before doing this, it is advisable to inspect the engine again, make sure there are no leaks of fuel, oil, coolant, as well as extraneous sounds in its operation.

If the engine does not start, there are three main reasons: - the starting system does not work; — the ignition system does not work; — the power system does not work.

Engine is warm or hot

The oil temperature in the engine crankcase is higher than the ambient temperature.

To start, just turn on the starter without touching the accelerator pedal. The engine control system will independently set the fuel supply and ignition parameters necessary for starting.

USEFUL ADVICE If for some reason the spark plugs are flooded during an unsuccessful start attempt, use the cylinder “blow-through” mode. To do this, press the accelerator pedal all the way and turn on the starter. In this mode, there is no fuel supply and excess gasoline is removed from the cylinders by a stream of fresh air, while the spark plugs are dried. After purging, try starting again as usual.

If the engine does not start, there are three main reasons: - the starting system does not work; — the ignition system does not work; — the power system does not work.

Starting system malfunctions

Malfunctions in the starting system manifest themselves in abnormal operation of the starter. There are five main starter malfunctions:

1. The starter does not turn on. The reason is a violation of contact connections, a break or short circuit in the starter switching circuits, a malfunction of the traction relay.

2. When the starter is turned on, multiple clicks are heard. The reason is a malfunction of the holding winding of the traction relay, the battery is severely discharged, and the contact connections in the starter circuit are loose.

3. The starter turns on, but its armature either does not rotate or rotates slowly. The reason is a discharged battery, broken contact connections, burnt contacts of the traction relay, dirty commutator or worn brushes, interturn or short circuit in the windings.

4. The starter turns on, its armature rotates, but the flywheel remains motionless. The reason is a weakening of the starter's attachment to the clutch housing, damage to the teeth of the flywheel or drive gear, slipping of the freewheel of the drive, breakage of the lever, drive ring or buffer spring of the starter drive.

5. The starter does not turn off after starting the engine. The reason is a malfunction of the starter freewheel, sintering of the contacts of the traction relay. In the event of such a malfunction, stop the engine immediately!

These faults require qualified intervention at a car service center or upon arrival at the garage. Beforehand, you can only check the degree of discharge of the battery using a voltmeter in the instrument cluster and the tightness of the contact connections in the starter circuit.

Checking the ignition system

WARNING Your vehicle is equipped with a microprocessor-based (High Energy) ignition system. A voltage of about 40,000 V is supplied to the high-voltage wires, and although at low current levels it is not life-threatening, a possible electric shock when checking the ignition system can lead to serious consequences. Therefore, if you handle a high-voltage wire with the ignition on, use a thick rubber glove or, as a last resort, pliers with insulated handles.

You will need: slotted and Phillips screwdrivers, pliers with insulated handles and a tester.

HELPFUL TIP Before checking the ignition system, place the gear shift lever in neutral and leave the parking brake on.

1. With the ignition off, check the integrity and fit of the high-voltage wires in the ignition module.