VAZ 2114: stalls at idle (injector): 6 reasons

Owners of domestic cars often complain that the VAZ 2114 stalls at idle (injector). The problem does not appear immediately; often even the engine gives signals to the owner, for example:

Noticeable increase in fuel consumption;
At low speeds the car jerks;
The engine speed fluctuates noticeably.

If you don't pay attention to this, you can end up with a lot of problems in the future. Let's look at the reasons for the drop in idle speed.

The IAC has failed

One of the common problems why the engine jerks at idle is failure of the IAC. The sensor is a device that helps control engine speed by allowing a small amount of air into the engine. Which, in turn, detects the mass air flow sensor and gives a signal to the engine ECU, which is responsible for fuel supply.

If the sensor fails, you may notice floating speed at idle, and while driving, the engine may stall when the gear is turned off. If you observe such symptoms in engine operation, removing the sensor and cleaning it will help, but it is best to replace it with a new one and forget about this problem.

Mistakes while driving

It is impossible not to mention that the engine may stall if you do not release the clutch pedal smoothly enough when changing gears in a car with a manual transmission.
This situation especially occurs at the beginning of the movement for inexperienced drivers. At the same time, problems with the gearbox or clutch may well confuse an experienced driver. The wrong gear selected when the load on the internal combustion engine is high or the speed is low, as well as untimely gear shifting will also cause the engine to stall. Such situations are typical for inexperienced motorists.

Air leak

If the idle speed of a VAZ 2114 drops, then you should look at the engine intake system. Perhaps some pipe or intake manifold has burst, because of this, excess air enters the engine outside the MAF sensor, as a result of which the mixture in the engine becomes leaner. To diagnose the problem, take a can of carburetor cleaner or “quick start” and spray it on the pipes and the manifold itself in hard-to-reach places and connections. If you notice that engine performance temporarily improves and is restored, then the problem area has been found.

Useful : TOP 10 reasons why engine thrust may be lost

What to do if the car stalls while driving and will not start:

Turn on the hazard warning lights;
If an emergency stop occurs in the dark, wear a vest with reflective elements;
Set up a warning triangle;
Try on your own or with the help of other road users to remove the car from the roadway;
Try to fix the problem yourself.
If the problem cannot be resolved, you need to tow the car to the nearest car service center or use the services of a tow truck.

Dirty throttle valve and pipes

From time to time the throttle valve becomes clogged, for example if the air filter is already in poor condition. Then it’s worth removing all the pipes from the throttle, checking them for permeability and blowing them out. It definitely won't be redundant.

Next, disconnect the throttle cable and wires and remove the throttle. The cleaner can be found at any auto store. In case of heavy contamination, take a clean container and soak the throttle valve in gasoline in it for some time. Don't be afraid to blow out absolutely everything, as the throttle has narrow channels that can also clog.

Recommendations

So, the car stalled while driving, what to do next:

Using the inertia of movement, push the car off the roadway, no matter whether it is a city road or a highway.
Turn on the alarm.
It is mandatory to install an emergency sign at the back of the car: there are plenty of fans of high-speed driving everywhere, there is no need to create an emergency situation.
Put the car on the handbrake.

Option 2 for further developments:

Do the repairs yourself.
Find a way to transport the car to the service.

In order to avoid such unpleasant and unexpected moments when the car stalls while driving, you need to follow simple rules:

Carry out vehicle diagnostics at a service center as often as possible.
Carry out preventive maintenance and inspection of the machine yourself.
Monitor the condition of parts and replace them in a timely manner so that the machine does not break down in unexpected places.

You should always have a tool with you to repair minor damage, as well as a can of gasoline to avoid stopping due to its absence.

A car that stalls while driving can create a dangerous situation no matter where it occurs. If you are in motion, even at low speed, and your car suddenly stalls, then it is quite possible that someone, unable to brake in time, will crash into your rear bumper.

And if the car stalls on a busy highway, then there is a high probability of getting into a very serious accident. If your car stalls while driving and won't start, the possible reasons can be very varied. In this article we will look at the 6 most common reasons for this behavior of a car on the road, as well as methods for solving this problem.

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TPS is out of order

The throttle position sensor is another suspect. The symptoms are similar to IAC, except that when moving away smoothly the car will do so jerkily. The sensor is also located on the throttle in the area where the throttle cable is connected.

The test can be done using a multimeter. If TPS is installed on the car, then open the throttle and watch the tester readings, they should change smoothly. If removed, then use a screwdriver and also look at the readings.

Useful : 8 reasons why the VAZ 2114 does not start when hot

Fifth reason – Low fuel pressure

If your car stalls while driving up or down hills, the problem may be low fuel pressure. If this problem occurs, your machine will not operate reliably.

Generally, the car can start and drive easily on level roads, but will likely stall when going uphill due to low fuel pressure. Fortunately, this is one of the simplest problems; to fix it, try adding a little injector cleaner to the fuel tank.

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Fuel pump strainer is clogged

Considering the quality of fuel supplied to our market, you can often encounter a similar problem. If you have checked everything listed above, but still have not figured out the problem, it is better to immediately go to the nearest auto parts store and purchase a new mesh there. The issue price is about 70 rubles.

Then, under the rear seats, we find the hatch and unscrew it, gaining access to the gas tank. We disconnect all the tubes and remove the fuel pump mount and remove the entire mechanism from the tank. A mesh will be attached to the supply to the fuel pump, remove it and install a new one. Afterwards we collect everything back into the gas tank.

Additionally

Brake malfunction. In this case, the design of the vacuum booster is usually faulty. The problem comes to light when braking hard - resulting in a stalled engine (i.e. it slowly stalls on its own). Usually the entire amplifier is replaced or its adjustment is made.
Exhaust system. The exhaust system may be contaminated, and after such contamination the car simply cannot “spit out” all the accumulated gas and begins to “choke.” It is necessary to clean the muffler; if the problem is not only contamination, but also a breakdown of the catalyst, the exhaust system must be completely replaced.

Is it due to poor fuel quality? Often the problem is precisely the fuel of low quality, or that does not correspond to the brand of car the driver is driving.

Gas stations need to be carefully monitored. Fuel tends to pollute and contribute to the rapid wear of many vital parts for a car.

When using low-quality mixtures, the following occurs:

Rapid contamination of the fuel filter.
Malfunctions appear in the operation of the injection nozzles.
Throttle valves become dirty quickly.
The fuel pump is not working properly.

The most important indicator of a malfunction is a gradual decrease in engine power, as a result of which the car will stall even when the gas pedal is sharply pressed. Many problems can be identified yourself without spending extra money to pay for the services of a service center, but if the problem is not eliminated during an external inspection and subsequent repair of fuel systems, you will have to conduct computer diagnostics to more fully and deeply identify problems.

If your car has an automatic transmission and the car periodically stalls while driving, then the problem is usually in the power supply.

When the transmission changes gear, the computer receives a notification that some part is faulty and decides to immediately turn off the engine. Problems with this type of car must be resolved as quickly as possible; repairs must be carried out only by specialists. Personal interference will lead to an even bigger problem.

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DMRV has failed

What to do if the VAZ 2114 stalls at idle. The mass air flow sensor may fail. It controls the flow entering the engine, so if its operation is disrupted, the fuel mixture will be rich. The mass air flow sensor can be checked in three ways.

With the engine running, disconnect the terminal and see if its operation changes.
Perform diagnostics using the screen on the dashboard. You will see code P0113, which indicates a problem with air entering the combustion chamber. If the sensor fails completely, problems with idle speed may appear, but it will be diagnosed as working.
Multimeter. Make sure the engine is stopped and the ignition is turned off. To diagnose, we need to measure the voltage on the sensor using two wires: green and yellow. Normal values are considered to be from 0.999V to 1.02V. If higher or lower, the sensor is faulty.

Try to always monitor and listen to the engine. If you notice that the engine on a VAZ 2114 does not pick up speed when cold, it is better to immediately begin troubleshooting the problem. Also, do not wait until the problem appears that the engine does not hold speed at idle - pay attention to the car, and it will not cause you unnecessary trouble.

Main reasons

The engine stalls:

When changing gear, as well as at neutral speed.
While pressing the gas.
When the engine speed is reduced.

It is worth noting that the causes of problems for injection and carburetor engines are usually different. Another important factor is at what time the engine stalls: cold or hot. The reasons may be the following:

Poor quality gasoline. Engine malfunction may occur due to refueling with low-quality fuel. Any knowledgeable driver will ponder when and where the last gas station was filled. There are cases when, after refueling at another station or with a different brand of fuel, the car begins to stall while driving.
Faulty spark plugs. If, while driving, along with a sudden stop of the engine, the car makes sudden movements in the form of jerks and starts poorly, then the reason is in the spark plugs.
Fuel filter. Another cause of malfunction is a dirty fuel filter. Over time, as the fuel mixture passes through, the filter becomes clogged with waste. If there is a fault in it, it should be replaced.
Why the car stalls while driving is due to a faulty fuel pump. With this malfunction, fuel cannot flow normally into the aggregate system; in this case, you simply need to replace the pump.
The battery must be kept clean, the terminals must be cleaned on time, since without proper care they either oxidize or become clogged.
The generator is a very serious and important part of the car. If it malfunctions, all energy consumption falls on the battery, which, without the support of a generator, can very quickly discharge, and the car will not just stall, but will stand somewhere in the middle of the road until it receives a charge.
Air filter. When it becomes contaminated, a failure occurs in the timely enrichment of the fuel mixture. Very often, car owners forget to change the filter in a timely manner, which leads to malfunctions and breakdowns.
Optional equipment. With a large number of installed additional parts that provide comfort to the owner, a huge amount of energy is consumed. The car begins to stall because it does not receive enough charge to operate normally.

In the case of a stalled engine at the very beginning of operation, when the car has not yet warmed up and the engine is not hot, the following problems may occur:

The air-fuel mixture supply system is faulty.
The automatic throttle is faulty or the adjustment is incorrect.
Thermostat malfunction - if this part breaks down, the engine will not be able to warm up normally and give the required speed.
Fuel injectors are very dirty.
The coolant sensor is broken.

There can be a lot of reasons for a breakdown; special diagnostics, which are carried out only in car services, can correctly determine the cause. Only after this should you begin repairing the machine. Once you find out what the problem is, it is easier and faster to repair the car.

For cars with an automatic transmission, the automatic transmission sensor may light up while driving, and then the car stalls.

In this case, the automatic transmission should be diagnosed. The repair of such a malfunction should be entrusted to specialists. Usually, in car services, immediately after diagnostics, at the driver’s request, the auto mechanic disassembles and sorts out the box and fixes the problems. Usually the box does not need to be completely replaced.

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