Grant fuel consumption at idle

• AvtoVAZ

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04.08.2019

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In the modern world, where the price of fuel is constantly rising, it is necessary to think about how to save on your movement. Giving up the car is not an option, but trying to reduce fuel consumption, in particular on the Lada Granta, can be considered an acceptable option. This is exactly what we will talk about today.

The main reasons for increased fuel consumption.

There is no driver who has never thought about the fuel consumption of his car. Believe me, friends, even owners of expensive supercars also think about fuel consumption. Here's the thing. Most often, increased fuel consumption can be a specific sign of a malfunction in the car. Unfortunately, this search for faults that may have caused increased fuel consumption can be very lengthy and not so simple.

Our online publication 1GAI.RU invites its readers to familiarize themselves with the most common causes of malfunctions in the fuel and other car systems, due to which the car begins to consume more fuel (overconsumption occurs).

Of course, we all know that fuel from the tank flows through a gas line into the combustion chamber of the engine. The amount of fuel supplied to the power unit depends on many factors. Therefore, it is quite natural that a car cannot constantly consume the same amount of fuel. And this is quite normal when a vehicle consumes either more or less amount of gasoline or diesel fuel, depending on its operating conditions. For example, first of all, such consumption depends on how much the vehicle is loaded by weight (empty or with a full interior of passengers and luggage).

Also, secondly, the very distance over which the car moves plays an important role here. In addition, you should not forget about the time of year when exactly the machine is operated. It's no secret that in winter a car consumes much more fuel than in summer. Moreover, all external factors and driving style directly affect not only gasoline engines, but also diesel vehicles.

In most cases, increased fuel consumption is not directly related to any malfunctions in the car. Most often, each driver can directly influence the fuel consumption of his car by first changing his driving style. Among other things, it can be noted that in order to reduce fuel consumption, you must first of all inspect the wheels and some other parts of the car, which, even if in good and serviceable condition, can still be the main reason for excessive fuel consumption by the car.

But it happens differently; it is not uncommon for increased fuel consumption to be associated precisely with possible defects in car components. In this case, it is simply not possible to solve the problem quickly. After all, to do this, you must first install and find this malfunction. Unfortunately, it is quite difficult to find the defect that became the main reason for the increased consumption of gasoline or diesel fuel by a car.

Such reasons for excessive fuel consumption can be both external and internal factors of vehicle breakdown.

Also, as we know, everything in a car is interconnected and the cause of increased fuel consumption can be small defects in several components.

Clutch and brake sensors Lada Granta

Thanks to the signals sent by these sensors, the controller receives information about whether the corresponding pedals (clutch and brake) are pressed or not pressed. Both elements are located in the area of ​​the pedal assembly.

The clutch sensor is a stabilizer, which from a design point of view is a limit switch. Its failure will lead to surges in speed and unstable operation of the engine. The car owner will be informed about the breakdown by the illuminated Check Engine; in addition, problems will appear with sudden jumps in speed during gear shifts.

The above is evidence of the following malfunctions:

• the height of the pedal is incorrectly positioned relative to the floor;
• clutch sensor is faulty;
• there are disturbances in the circuit.

They also began installing brake pedal sensors on Grants. However, many owners of this car, after only using it for a short time, notice error P0504, indicating a breakdown of this sensor. In most of these cases, the above error occurs due to incorrect adjustment of the element. For this reason, car owners report symptoms such as:

• unstable engine operation;
• instability of speed.

Functionally, the brake pedal sensor is responsible for the position of the pedal itself and turning off the brake lights. In addition to its misalignment, problems with this part can be caused by a breakdown of the spring located inside the sensor.

The presence of a malfunction will be confirmed to the owner by the illuminated Check Engine and the already mentioned error P0504. This error is a consequence of a breakdown of either the sensor itself or its wiring. In addition, the cause of the error is often the misalignment already mentioned above. The new element will cost the car enthusiast approximately 180 rubles.

In what cases should you pay attention to fuel consumption?

If you, dear motorists, have noticed that your car has begun to consume more fuel, even by just a few percent, then you should not focus too much attention on this. This is normal for cars. If there is a slight increase in fuel consumption, you can most likely be sure that your car has no malfunctions at these rates.

How to independently determine the cause of increased fuel consumption

Before taking your car to a car service center for diagnostics, to establish the causes of increased fuel consumption, you can independently inspect the car and perhaps you yourself will be able to eliminate the increased consumption of gasoline or diesel fuel by the car.

First, you must initially check the pressure in all tires of the car. The fact is that the most common cause of excessive fuel consumption is incorrect tire pressure. For example, if the tire pressure is insufficient, fuel consumption can increase by almost 30%.

Therefore, remember, friends, you must regularly check the pressure in the wheels and never allow the pressure in them to be more or less than 0.5 bar from that recommended by the manufacturer.

Please remember that incorrect tire pressure reduces or increases rolling resistance, which ultimately affects fuel consumption. The formula here is very simple: -The lower the rolling resistance, the lower the fuel consumption.

Air resistance while the car is moving also plays an important role in this factor.

For example, if you installed a box on the roof of the trunk or placed any weight on it, then the air resistance will immediately increase and the car will begin to consume much more fuel.

Among other things, in open areas and when driving at high speed, the vehicle's fuel consumption may also increase, and all this is due to increased air resistance. For example, such a phenomenon (excessive fuel consumption) is often observed when driving along overpasses and on highways. If a strong headwind blows while the car is moving, the car’s fuel consumption may increase by about 10 - 20%.

In particular, an increase in such consumption may also be due to a dirty air filter. Remember, fellow motorists, that a dirty air filter reduces the flow of oxygen that is needed into the engine. As a result, a non-optimal fuel mixture will enter the engine and the fuel efficiency of the power unit will significantly decrease. Therefore, friends, remember, try to check the condition of the air filter not only at those moments when the engine oil is changed, but also to inspect the filter between scheduled maintenance intervals.

Gas pedal position sensor Lada Granta

Granta's fully electrified engine control implies the presence of an electronic gas pedal, thanks to which the owner of the car can indicate the desired acceleration or deceleration of its speed by pressing this pedal, or by weakening the pressure. Such systems are known as “E-gas”.

This system includes a lever made of plastic and two built-in sensors. By their design essence, they are potentiometers, and the information they transmit helps the ECU track the position of the pedal, with its possible changes, which the system controls using information about changes in the resistance level at the device terminals.

When the electrically conductive tracks and moving contacts wear out, the devices begin to provide incorrect information. Their breakdown will lead to instability in the functioning of the engine and a spontaneous change in the frequency at which the crankshaft rotates at idle.

A breakdown of one of the elements or a malfunction of its circuit will be indicated by the illuminated Check Engine. When the time given by the ECU to restore the signal expires, the system will transfer the engine operation to the reserve operating mode. Activating this mode will lead to a slow increase in speed, which will follow after a sharp press on the gas pedal, which will preserve the vehicle’s ability to move independently. Its operation in this mode can provoke a sharp increase in fuel consumption standards; in addition, other engine performance indicators often change.

If two sensors break down at once, the engine will be put into emergency mode, during which it will begin to function only at speeds slightly higher than its idle speed. This will allow you to maintain the minimum ability of the car to move (since its speed will be quite slow).

Mechanical causes of increased fuel consumption

As a rule, all components of the engine and the machine’s attachments are directly responsible for its fuel consumption, since they place a certain load on the engine. Any shaft, roller or belt (etc.) must have free movement and not load the engine itself during operation. Otherwise, during rotation and even slight resistance, you will observe increased fuel consumption by the machine.

Please remember that if something is faulty under the hood of the car, then when you carefully listen to the operation of all systems in the engine compartment, you may hear some kind of grinding, or creaking, or whistling, etc. noises. These sounds will directly indicate to you that some components of the car in the engine compartment are already defective.

In this case, there is a high probability that these car components directly affect the engine load itself, which of course will affect the fuel consumption itself.

The same applies to wheel bearings, which, if worn, will not give the car an optimal ride on the road. Ultimately, the car’s engine will work with increased load, and this will also affect consumption and, naturally, excessive fuel consumption.

The braking system of the car also plays an important role. If it is not working properly, it can significantly affect the fuel consumption itself. For example, brake calipers may not work simultaneously and synchronously, which will ultimately lead to uneven wear of the brake drum pads.

It is also not uncommon for a problem to occur when one or more wheels overheat much more than the others, and all this is due to a delay in opening the caliper itself after braking the car.

So, dear motorists, remember the following: if your car begins to consume more fuel than usual, then do not forget to check the temperature of the wheel rims after braking (of course, after the trip itself). If one wheel is hotter than the other or others, then there is a problem with the brake system in the car and in this particular wheel, which is also a likely reason for the car’s excessive fuel consumption.

But it will be most convenient to check the brakes directly on the lift, by rotating the wheels and by visually inspecting them. If you suddenly find that one of the brake pads touches the brake disc when the wheel rotates freely, or sticks out too close from the caliper, then you will need a more detailed diagnosis of the brake caliper.

Principles of fuel economy

Reducing gasoline costs for the Lada Granta is not difficult at all. First of all, you need to understand that the deeper and more often you press the accelerator pedal, the higher your gas mileage. And the less often you use the gas pedal, the more fuel you will save. The main skill that is trained over time is the ability to brake with an engine. Any driver, if desired, can easily get used to rarely using the brake pedal.

When braking by the engine, the load on the braking system is noticeably reduced, Grant fuel is saved, thereby the brake pads and the entire braking system will last longer. When the engine decelerates, fuel consumption is zero. According to reviews from experienced drivers, the savings are at least 10 percent.

During colder months, the car takes longer to warm up. However, the modern Lada Granta has the ability to warm up while driving, and there is no need to warm it up for too long. On a cold engine, you should not just accelerate sharply. And if your goal is to save on gasoline, you should avoid slipping and accelerate smoothly and evenly.

Significantly more gasoline is consumed on rough or unpaved roads. Additional kilograms in the trunk of your car increase fuel consumption, so do not carry anything unnecessary with you. Low-quality automobile oils lead to various malfunctions of the Lada Granta engine and systems and increase the car’s fuel consumption. Carry out technical inspection of the car in a timely manner. By following these simple tips, you can reduce your gasoline costs.

Defects in vehicle attachments and auxiliary equipment can lead to excessive fuel consumption

Malfunction and improper operation of auxiliary equipment installed under the hood of the car can lead to an increase (increase) in fuel consumption. For example, fuel consumption can increase significantly if the same air conditioning compressor malfunctions.

All motorists know that when the air conditioning is turned off, the car consumes very little fuel. But as soon as we turn on the cabin cooling, this fuel consumption immediately increases, from approximately 0.5 to 2.5 liters per 100 km.

This is primarily due to the fact that when the interior cooling is turned on, the air conditioning compressor, which is connected by a clutch and a belt drive to the engine, immediately starts working. As a result, the compressor begins to put a significant load on the engine, and the higher the temperature outside, the more power the air conditioner itself requires to cool the air inside the car.

Speed ​​sensor

The DS is intended to measure the speed of a vehicle, with subsequent transmission of the received data to the ECU. The speed sensor is a small part; it is located in the upper part of the clutch housing, near the front wheel on the right. Its malfunction is usually directly related to a breakdown of the speedometer. However, the sensors installed on Grants are distinguished by fairly high quality and durability.

By the way, initially three types of speed sensors were installed on Grants: VAZ-2170 PEGAS, 2190 AVAR Russia and 21700-3843010-02.

If the DS malfunctions, the electric power steering most often stops functioning, and at the same time the instrument panel begins to display error P-0501. As a rule, the steering wheel fails precisely because the car detects a breakdown of the speed sensor; the DS itself may show zero speed.

If the sensor fails, the following symptoms of failure are noted:

• the speedometer needle stops at the zero mark; often the speedometer operates only periodically;
• when the engine is running idle, interruptions are observed;
• the speedometer readings diverge from the actual speed of movement;
• fuel consumption standards are increasing;
• craving worsens.