Lada Granta troits engine reasons

Troubleshooting is one of the most typical and common malfunctions in engine operation. This happens if one or more cylinders stop functioning or work only partially. The main cause of the malfunction is a violation of the normal combustion process of the air-fuel mixture. Because of this, the internal combustion engine begins to operate unstably both at idle and when driving under load. The failure is almost always characterized by engine vibration and loss of power. Possible misfire with typical loud popping sounds from the muffler.

Causes of engine tripping and their elimination

The Lada Granta engine suffers for a number of direct and indirect reasons. Vibration is not the main sign of a malfunction of the internal combustion engine. This is an indirect manifestation that should be considered along with others. For example, vibration may occur if the engine mount is worn out. To identify the cause of the problem, you need a complete diagnosis of the car.

The check begins with the fuel line, followed by the ignition and air supply systems. Sometimes it doesn’t hurt to test the correct operation of the ECM - perhaps the reason is incorrect readings from failed sensors.

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Spark plug fault

One of the reasons for engine malfunction is late or early ignition, as well as failure to ignite the mixture caused by the absence or insufficiency of a spark. First you need to unscrew the spark plugs and inspect them. The spark plug must be replaced if there is visible damage to the insulator, this is immediately noticeable - the area turns black. Please also pay attention to compliance with the established standards for the gap between the two electrodes.

The next object to be checked are high-voltage wires. Since their insulation is made of rubber or silicone, over time the material dries out and cracks, resulting in “breakthrough” of the wires. A sign of this problem may also be the frequency of engine tripping, when after some time the engine operation stabilizes. Visually, a breakdown is easy to detect in any dark room: start the engine and open the hood - you will notice the glow of sparks on the wires.

The reason for the absence or insufficient spark may be a breakdown of the electronic ignition module. You will need an assistant to check its functionality. The spark plugs are unscrewed and secured to ground, and high-voltage wires are connected to them. After this, one person turns the engine with the starter, and the second looks for a spark.

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Intake problems

The engine may stall due to insufficient air supply to the cylinders or, conversely, due to its excess. The main reason for such a malfunction is the loss of tightness of the intake system, which causes air to leak from the outside. The engine control unit does not take into account excess air, resulting in a malfunction of the motor.

Checking the intake system is not difficult. The easiest way is to pinch the air intake pipe near the air filter. If the system is working properly, the engine will start to stall, but if excess air is sucked in, it will continue to work. Based on the hissing sound, it will not be difficult to find the place where the system is leaking.

Another reason is insufficient air supply to the cylinders. The source of the problem is a dirty air filter. Lack of air may occur due to obstruction of the throttle valve or its incomplete opening/closing. Usually the problem is solved by flushing the throttle assembly or replacing it.

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Sensor malfunction

One of the reasons for the tripping may be incorrect readings from the sensors of the internal combustion engine control system transmitted to the ECU. Due to incorrect parameters, the control unit does not regulate the throttle position. Because of this, he cannot calculate the correct composition of the fuel mixture, the engine begins to operate unstably or other problems are observed. A diagnostic scanner will help correct the situation, which will count errors that have occurred from the ECU and show which of the sensors has failed.

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Fuel system malfunction

Diagnostics of the power system involves measuring the pressure in the fuel system and determining the presence of air. The level of fuel pressure depends on the normal operation of the fuel pump. The main reasons for this problem include the following:

strainer (clogged);
electric motor;
fuel supply;
pressure regulator on the fuel rail.

Problems with injectors can also cause unstable engine operation. They often become clogged with dirt coming from the gas tank. As a result, the correct atomization of fuel is disrupted, or it is supplied in insufficient quantities due to the reduced throughput of the injector.

To check the injectors for functionality and clean them, a special stand is used, on which flushing liquid is supplied through them under pressure. This method creates an imitation of the operation of the fuel system in real conditions, and evaluates its performance. The injectors can be cleaned and washed independently. It is allowed to use any flushing liquid. The nozzle must open in a timely manner when a pulse is applied and not leak. Gasoline should not flow - a working device sprays fuel, since this is the only way to achieve efficient combustion in the cylinders.

If the listed problems are not found, it is recommended to check the engine control unit. It can fail in rare cases; usually the main reason for its malfunction is a change in the factory firmware. This happens when installing an LPG or if the owner did chip tuning by installing software from a third-party developer. An incorrect fuel map can cause gasoline to overflow and, as a result, spark plugs to flood.

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Low compression in cylinders

Low engine compression may indicate that it is worn out or has a malfunction. This means that one or more cylinders are not firing or are firing only partially, resulting in the combustion chamber not being compressed enough. Despite the fact that fuel is supplied in normal volume and of the required quality, complete combustion does not occur. Compression may drop if pistons, valves are burned out, piston rings are worn out, or there are defects in the cylinder head and other elements of the timing system.

Compression is measured in each cylinder separately. If deviations from the norm are detected, the engine must be disassembled for repair and diagnostics.

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Floating engine speed

Engine speed problems can easily be identified by looking at the tachometer. Stable operation of the power unit at idle should not exceed 850 rpm. A small spread of 750 to 850 rpm is allowed. If the tachometer needle jumps chaotically—it goes down, then it goes up—there is a malfunction. This is a fairly common problem, and it is easy to identify why the speed of the Lada Granta is floating. It is enough to listen to the engine running - with unstable idle speed, the noise either decreases or increases.

The floating speed is also indicated by a characteristic vibration that will either subside or increase, transmitted through the engine compartment.

Why are the revs jumping?

The cause of the problem is the specifics of regulating the operation of the power unit at idle by the control unit. It continuously reads data about the status of various engine systems from sensors. If the idle speed becomes unstable, the sensors are given a command to correct the functioning of the system.

A malfunction of the mass air flow sensor may be one of the causes of the problem. During operation, it becomes covered with a thin oil film, the formation of which will certainly lead to breakdown. When excess air is sucked through the inlet into the cylinders, idle speed is disrupted. As a result, the air flow sensor transmits incorrect information to the ECU about the excessive consumption of incoming air. The failure is displayed on the dashboard - a “check”, or engine error, lights up on the screen of the Lada Granta’s on-board computer. In this case, the control unit commands the valves to admit more fuel into the cylinders and equalize the ratio of air and gasoline to prepare the optimal mixture. As a result, the speed increases sharply, and the ECU realizes that there is too much fuel and gives the command to limit the supply. As a result, the speed drops sharply.

IAC (idle air control) can also cause jumps in engine speed, in which case a “check” will light up on the dashboard. The regulator is an electric motor with a cone-shaped needle. Its direct purpose is to adjust and maintain stable idle speed. A faulty regulator stops working normally, and the engine, left without it, begins to randomly increase or decrease speed.

Unstable idle may be caused by a problem with the oil pan ventilation valve. Engine operation is accompanied by the release of gases that accumulate in the pan. If there is a large amount of crankcase gases, they are discharged through the ventilation system through the intake manifold to the throttle assembly. With their help, part of the air-fuel mixture is formed in the combustion chambers. If the valve loses its normal throughput, then less gases enter to enrich the mixture, and the speed begins to float.

The throttle valve may not properly regulate the air pressure entering the combustion chambers. The cause of the problem is an oil film on the walls. The damper drive may also be faulty, causing the speed to involuntarily increase and decrease.

Methods for eliminating floating speed

Any cause of idle fluctuations can be neutralized in the following ways:

Excessive air leak. The intake system needs to be checked for leaks. You can treat the hoses with WD liquid - there is a crack in the place where it instantly evaporates. You cannot seal it with tape or tape; only replacing it with a new part will help.
IAC breakdown. The serviceability of the idle air control can be checked with a multimeter by measuring the resistance. If the readings are between 40 and 80 ohms, the regulator must be replaced.
Malfunction of the oil sump ventilation valve. You can get to the part only after removing the pallet. The valve is dismantled, thoroughly washed in gasoline or kerosene and, after drying, installed in its place.
Problem with DMRV. If the mass air flow sensor fails, it cannot be repaired; it can only be replaced with a new part.
Problems with the throttle valve. If the problem is incomplete closure, the throttle assembly can be washed, for example, with carburetor cleaning fluid or the like.

It is quite easy to fix problems associated with floating engine speeds on your own, especially when you have minimal skills and experience. If you think that you cannot cope with such work, it is better to contact a service station.

Other engine and system malfunctions

Compression in the engine cylinders is low.
The cylinder head gasket is damaged.
The engine control system is faulty.
The valves of the gas distribution mechanism are burnt out and leaky.
The exhaust system is leaking.
The valve clearances are not adjusted (8-valve engines only).
The hydraulic pushers are faulty.
The engine air filter is dirty.
Vacuum hose connections are leaking.

Have you encountered power failures or observed unstable engine operation? What was the reason? We solve similar power unit problems in the comments or on the forum. Let us remind you that along with misfires, other engine malfunctions may appear, for example, floating speed.

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When you turn the ignition key of a Priora car, all electronic systems are checked and the check light comes on for a few seconds, this is normal, as it should be. It’s bad when the check light doesn’t light up when you turn on the ignition, which means the check system isn’t working. If the checkbox on a Priora comes on and is lit when the car is started, the owner immediately falls into panic for some reason - at least in most cases. There's no need to panic, but I wouldn't recommend not paying attention. The engine has 16 valves - Priora is equipped with sensors in many components and this may indicate a breakdown. The check light is on on the dashboard of the Priora car, bottom left. Sometimes the check light comes on, you look, and it just drove through a puddle and the knock sensor got wet. The check light is on, it blinks when cold, but there is no need to panic, we need to look for the reasons. Let's make a reservation right away: there are false positives. Read the article and find out all the reasons why the check engine is triggered.

UCH error

The UCH is the central electrical switching unit of the passenger compartment. Designed to connect all connectors and blocks located inside the car. Many installers, for example, of alarms or music, install additional options without disconnecting the power from the battery, which is why when they remove the chip, especially with the ignition on, the computer thinks that there is an open circuit in the system and displays the corresponding error.

The problem can be treated either by deleting the error or resetting it by disconnecting the negative terminal of the battery.

Spark plug

Check the spark plugs first. They are the most common cause. Even if the spark plugs were changed not long ago, still unscrew and inspect.

A properly functioning spark plug does not have black deposits on the electrodes and insulator. The candle body is white, without black stripes or dots. The presence of defects indicates that the spark plug has been struck by a discharge and will no longer work correctly. Carbon deposits interfere with the normal formation of a spark and the engine will fail.

Carbon deposits on the spark plug electrodes are the main cause of combustion in an internal combustion engine.

The second reason is incorrectly selected candles. Buy those recommended by the car manufacturer. Too much or too little clearance can cause one or more cylinders to fail.

Recommended spark plugs for Lifan cars

Justine 07/04/2016 — 00:28

Lada Granta, 16 valve, mileage 100 thousand. It all started 2 months ago with a mileage of 95 thousand: I come to the car in the morning, start it, it immediately starts to trip, after a few seconds the check blinks, after a while the error “Misfire in cylinder 4” is recorded " I turn off the car and immediately start it again - everything works smoothly. The same situation could have happened simply after a short stop, when the engine cooled down to about 60 degrees - the car started up in the same way. After suffering like this for a month, swapping coils, replacing spark plugs, changing gas stations, I decided to pour injector cleaner into the tank. While I was looking for the tank with the cleaner, it also started and troubled, but recently it has become less frequent. Even before the start of the tripping, I noticed during startup that the spark plug in cylinder 4 unscrews extremely tightly along the entire length of the thread, and the first three unscrew well. Previously, all 4 spark plugs unscrewed well.

Why can the engine stall when cold and why does the spark plug in cylinder 4 unscrew very tightly?

LADA Granta Drive Active

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Specifications

Lada Granta Drive Active 2022 has a power of 106 hp. The petrol 16-valve engine reaches 100 km in just 10 seconds. A special feature of the configuration is two options for controlling the transmission using a classic “mechanics” or a 5-speed “automatic” with the ability to manually change gears. Three driving modes: “urban”, “winter” and “sport” will help you gain complete control over the car in any conditions. Drive – front.

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Source: https://www.major-auto.ru/models/lada/granta_drive_active/

Malfunction of the injector or nozzles

The injection engine fails in the following cases:

The injector is faulty, but this is very rare.
Bad gasoline was poured in or fuel system cleaner was used incorrectly.
Clogged injectors.
The electrical power supply circuit for the injectors is open or shorted.

Engine diagnostics and a competent motor mechanic will help eliminate such malfunctions. To independently check the injector and nozzles, you need experience and special equipment.

High voltage wires

Checking high-voltage wires is mandatory when diagnosing an engine when it is tripping. There should be no traces of breakdown on them. Spark plug tips must be clean and free of carbon deposits.

After visually inspecting the spark plugs, check the high-voltage wires. There should be no traces of breakdown: black dots or stripes. Due to the breakdown, the current does not reach the spark plugs. This defect is the next reason for the tripping of an internal combustion engine.

Checking the wires yourself will not cause difficulties. They are tested with a conventional multimeter. It is necessary to measure the resistance of each wire.

Video of checking BB wires

Check the wires with a multimeter. Measure the resistance of each wire. It differs for different car brands, but does not exceed 20 kOhm. Good wires have the same resistance. If one of them shows much less or more, then it is faulty and because of it the power unit is tripping.

Low compression

Trouble the engine due to insufficient compression in the engine cylinders. The decrease occurs: when the rings are stuck on the pistons, the valves burn out. Some car models allow valve adjustment. Incorrectly set gaps are the cause of tripping of an injection engine.

If you have trouble with the engine and one or more cylinders are not working, do not rush to go for computer diagnostics. A scanner check will detect a misfire, but will not indicate the cause. The cylinder is not working - this is already obvious. Before going to a car service center, check the spark plugs and wires. They are most often to blame for engine trouble.

Conclusions obtained after diagnostics

When carrying out a thorough diagnosis, special attention must be paid to the appearance of the spark plugs. The presence of the following signs is unacceptable:

carbon deposits;
destruction of insulators;
worn caps;
failure of explosive wires;
switch failure;
The ignition coils have failed.

If an insufficient amount of fuel is poured into the cylinder, it means that the parts and components of the fuel pump are faulty. Increased fuel supply indicates that the fuel injectors are dirty and have become unusable. Impaired settings of the electronic control unit are also the cause of the engine shaking.

Such situations are often observed, as a result of which the engine can also trip:

air filter contamination;
throttle valve wear;
Air flow sensor malfunction.

The lack of engine compression or its low level is the most difficult defect. This type of engine failure can indicate the following facts:

burnout of pistons;
valve failure;
complete wear of the piston rings.

The car owner needs to determine why the engine is stalling and what to do next. It is necessary to seek professional help from the nearest service station, where qualified computer diagnostics of the car’s power unit will be carried out.

Why does the Lada Granta engine stall?

Causes of cylinder failure

The appearance of missing is caused by the following factors:

failure to adjust the ignition start;
air intake in the brake system;
accumulation of carbon deposits and breakdown of spark plugs;
the integrity of the electrical wire leading to the spark plugs is broken;
the appearance of malfunctions in the capacitor;
violation of the integrity of the intake manifold;
piston valve wear;
the piston rings have become unusable;
failure to adjust the gas distributor valves;
violation of the integrity of the gaskets in the fuel pump head;
wear of oil seals;
adjustments in the carburetor are broken;
air filter clogged;
violation of the vacuum membrane of the advance regulator;

Inconsistency between the spark plug sizes and this type of engine can cause serious malfunctions in its operation.

When a cylinder stops functioning, the engine fails, the reasons that caused this defect entail a loss of power of the power unit, an increase in fuel consumption, and a malfunction of all vehicle systems.

All cars for which AI-92 gasoline is contraindicated. The car will have to be sent for overhaul

Tips In addition, the engine may fail due to untimely replacement of spark plugs or their poor quality. This can be determined by the presence of soot and other defects on the spark plugs. It is advisable to change them at every oil change or at least every other time. At the same time, it is recommended to purchase products from well-known manufacturers, not necessarily from the expensive segment.

This phenomenon is often caused by contamination of the crankcase ventilation or damage to the hoses. In this case, the ventilation system should be cleaned and the hoses replaced.

Often, a malfunction of the ignition coil causes the power unit to trip . This problem can be determined by computer diagnostics and inspection of this part. In this case, the faulty coil should be replaced.

All of the above faults do not require expensive repairs, and you can install them yourself if you have experience and equipment, or for a very reasonable fee in almost any car service center with good recommendations. But sometimes the engine can fail for more serious reasons. Therefore, if all the tips presented above did not help, you probably cannot do without consulting an experienced mechanic. Author: F. Averyev

Distributor and capacitor

If the problem is in the capacitor on the distributor (and it can either fail completely or partially), then the engine will start and can operate properly and stably at idle speed. But while moving, the unit will twitch. This indicates a damaged capacitor. Remove the cover from the distributor, move the slider so that the contact opens. How is it checked? Turn the slider by hand to open the contact.

During the opening process, a spark should jump. If the capacitor is damaged, it will be blue and quite strong.

Knocks in the engine

It also happens that the engine begins to make abnormal sounds that were not previously characteristic of it. And, with an increase in engine speed, the sounds only intensify.

Crankshaft pulley

Most often, we are talking about vibrations of the crankshaft pulley. In this case, you will have to replace it with a new one, since it cannot be repaired. You can also highlight the loosening of the timing belt. To remove this effect, it will be enough to adjust the tension through a specialized service technician.

Flywheel loosening

It may also be that the flywheel is loose. This doesn't happen often, but it's worth checking just in case.

Inability to gain power

Situations are also possible when the engine makes “heavy” sounds, which is accompanied by the inability to gain full power. And there are reasons for this.

If you purchased Granta new, then the problem may be its newness.

Until a break-in period of 6-7 thousand kilometers is completed, maximum power cannot be gained. Moreover, it is not recommended to increase the crankshaft speed above the 3 thousand mark for the first 2000 thousand kilometers.

Low pressure in the fuel system

If at high speeds it seems to you that the engine:

does not develop enough power,
It's like he's hitting a wall
or when accelerating, “they throw extra weight into tow”

this indicates insufficient pressure in the fuel system. This could be due to a clogged fuel filter. In this case, diagnose and replace the fuel filter.

Bad fuel (gasoline)

The loss of power may be due to low quality fuel, in other words, when you were filled with “badyagu” under the guise of 92 or 95 gasoline. Often, gas stations dilute gasoline with water, or use special “Chinese” cheap additives to increase the octane number of low-grade fuel. In the worst case scenario, you will have to drain all the gasoline from the tank and fill it with new one.

Electronic gas pedal glitches

As in the previous case, the problem may relate to a malfunction of the electronic gas pedal . In addition, there is a chance that the pressure in the ramp is not high enough. The solution to these two problems can be found in the previous section.

The engine will not be able to gain power because the valves are clogged or the spark plugs do not operate stably enough, as a result of which some strokes “skip”.

Insufficient compression

In addition, do not forget about the possibility of low compression in the cylinders, which is less than 1.0 MPa. To find out the reasons for this phenomenon, it is necessary to disassemble the motor. This will make it clear whether the cylinder head gaskets or pistons have burned out, or whether the piston rings have broken or stuck. Among other things, the cause of such compression may be poor adjustment of the timing valves. If the engine has already covered a sufficient mileage, then we are talking about natural wear and tear on the engine components.

On an 8-valve Lada Granta engine, it is necessary to measure compression only after adjusting the valves!

The compression on the Lada Granta should be at least 12-13 atmospheres. If it is more, about 15, then most likely it is necessary to replace the oil scraper rings. If the compression is less, the engine is worn out, it needs to be repaired, it will not develop sufficient traction!

Compression gauge - it is used to measure the compression in the engine

Why does the engine stall? Causes and methods of eliminating engine tripping

If you, in the company of your friends, say that your engine is missing, they may misunderstand you or simply look at you with “square” eyes. It’s another matter if you complain that the engine is running rough or one of the cylinders is not working, in which case you will be bombarded with a large number of different versions and assumptions taken supposedly from personal experience, as well as advice on what needs to be done in this case . You can, in principle, listen to the advice of friends, there is nothing wrong with that, but I would also recommend listening to the opinions of experts on this matter. In my article today, I will talk about what engine tripping is and where it comes from, you will learn about the causes of this unpleasant phenomenon, as well as ways to eliminate this malfunction. Armed with the information I needed, I decided to visit the mechanics at one popular bus station in our city, in order to find out whether the various “experts” wrote on the forms were true and whether they should be trusted. Simply put, I decided to ask why the engine troubles those who are directly related to this.

Fuel consumption of VAZ 2114 at idle speed

How to reduce fuel consumption on a VAZ 2114 is a question many car owners ask.
What the gasoline consumption of a VAZ 2114 should be is usually indicated in the factory documentation. It ranges from eight to 9 liters. per 100 km. This spread depends on the driving style and its mode (city, highway, mixed). If the characteristics of your steel “favorite” fit into these frameworks, then most likely no intervention will reduce them.

But if your VAZ 2114 has high fuel consumption, then this is already a reason to carry out diagnostics and most likely repair the systems of your car.

If you yourself do not have sufficient knowledge or skills, then it is better for you to contact a special workshop where they will accurately answer the question: why the fuel consumption of the VAZ 2114 has increased.

Here we will talk about possible causes and methods for eliminating them.

Prerequisites for the huge fuel consumption of the VAZ 2114

Possible reasons

Increased fuel consumption of the VAZ 2114 may be caused by the following reasons:

Clogged air supply filter;
Inadequate tire pressure;
The fuel filter is dirty;
Unusual wheel radius;
Malfunction of the oxygen supply sensor;
DSA is out of order;
Incorrect DPRV readings;
Low fuel pressure;
Low compression.

First, let's look at the simplest reasons for high fuel consumption.

Gasoline consumption on a VAZ 2114 may increase due to a dirty fuel filter; check it for debris and replace it if necessary. Dirt packed into the air filter can increase the gasoline consumption of a VAZ 2114 by about three liters. Despite the fact that its cost is about 100 20 rubles. Very low tire pressure also has a negative impact, as does an unusual wheel radius. It’s clear: in order to turn a larger wheel, more force is required.

Next, let's find out which sensors affect fuel consumption

The lambda probe assesses the state of the exhaust (the presence of oxygen in the exhaust gases). In other words, based on the volume of oxygen in the exhaust, it provides regulation of the working consistency. It is installed in the exhaust system; it must be emphasized that it is the only one located on the “pipe”, so you can’t go wrong. An oxygen sensor error can be seen either with the help of an on-board vehicle, or when passing diagnostics at 100. Here are some prerequisites for its “death”:

Poor quality gasoline;
Stiff valves;
Incorrect mixture;
Oil scraper rings allow oil to flow into the mixture;
The advance angle is set incorrectly.

Lambda probe VAZ 2114

If the fuel consumption of the VAZ 2114 has increased, then you should also check the speed sensor. It transmits data about the current speed of the car to the control unit, and it monitors the operation of the engine in idle mode and controls the air supply, bypassing the throttle valve. It is diagnosed in the same way as the previous one. This device is located on the top of the box. Some signs of its malfunction:

The engine stalls at idle;
Interruptions in the operation of the speedometer, or its complete failure;
Idle speed “floats”;
High fuel consumption;
Loss of engine traction.

Fuel consumption of VAZ 2114 at idle speed

Speed sensor VAZ 2114

Next comes the camshaft position sensor or, as it is also called, the phase sensor. It works in a phased injection system, determining the engine operating cycle and generating a pulse signal. It should be clarified that it is not installed on all VAZ models. A malfunction is indicated by a “check” light on the dashboard. The functionality check is also determined at 100, or when reading error data on the BC. How to “identify” that he is acting up:

Engine dynamics drop;
Gasoline consumption increases;
The self-diagnosis mode fails.

The average fuel consumption of the VAZ 2114 also depends on the working condition of the fuel pump. On this VAZ model it is electronic, and wear of its parts leads to a drop in pressure in the fuel supply system, which certainly does not have the best effect on consumption. You can find out this parameter by measuring it using a pressure gauge on the fuel frame of the engine. Here are the symptoms that should alert you to the pump:

The engine is shaking;
Power drops;
Consumption increases;
The engine stalls at idle;
CO is overestimated.

Frozen pressure in the fuel rail of VAZ 2114

The condition of the injectors is also important. At times, during engine operation, they become clogged and need to be cleaned. There are various options for this procedure: turn to specialists, clean it yourself (if you know how to do it), use additives and consistencies specially created for these purposes, or connect the car to a special stand. The choice is up to you. Reasons for injector inspection:

Excessive consumption of fuel;
Increased exhaust toxicity;
Unsatisfactory engine dynamics;
When accelerating, dips are felt.

Injectors VAZ 2114

Increased consumption in idle mode

Does the VAZ 2114 have higher fuel consumption at idle than normal? There are sensors watching everything here too! Typical consumption, with the electronic load completely turned off, is 0.8-1 liters per hour. If this indicator is very much exceeded on your car, then we check the sensors described below.

Idle speed sensor (ISR). Its purpose is to automatically adjust idle speed. It is located on the throttle assembly, or rather secured with a pair of screws on its cover. This sensor does not have an electrical diagnostic system and therefore its condition can only be judged by these signs:

When starting a cool engine, high speeds are not observed;
The engine stalls at idle;
Idle speed “floats”;
When you turn off the speed while driving, the gearbox stalls.

Idle speed regulator VAZ 2114

TPDZ. A device for a clear dose of consistency or, more simply, a throttle valve location sensor. By its name you understand that its function is to “show” to the controller what position the throttle valve is currently in. It is part of the throttle assembly and is attached to its body. The malfunctions of this device are very identical to the symptoms of DXX, but it is connected to an electrical diagnostic system and if it breaks down, the “check” light will notify you about it.

In addition to all the circumstances listed above, there are some more: insufficient compression in the engine, incorrectly set ignition timing, the gas distribution system is not adjusted, lack of spark plugs, breakdown of high-voltage wires. These prerequisites can also have a negative impact on the average fuel consumption of the VAZ 2114.

If you feel the strength within yourself to remove them, then go ahead! If you have doubts about this, it is better to contact a special service center, this will help to avoid unnecessary costs.

Source: https://avto-melvin.ru/rashod-topliva-vaz-2114-na-holostom-hodu/

Sometimes there are cases when the engine only starts “cold” or “hot”

In this case, the valves are most often the cause; they may have become misadjusted. Valve adjustments should be carried out every 20 thousand km. The essence of this problem is that most likely the valves have large gaps, but after the engine warms up they become smaller and the engine does not leak. The same applies to “hot” conditions - when the engine is cold, the valves are normal and the engine is running smoothly, but after warming up, the unregulated valve is clamped, as a result, the cylinder stops working and the engine begins to stall.

I will end here, I hope my article was useful to you and you found the reason for the engine tripping. If not, seek help from specialists. If you know other reasons for engine tripping, I’ll be happy to hear them, use the comment form.