The VAZ injector starts up and stalls. After starting, the engine immediately stalls: why does this happen VAZ 2107 starts up and the carburetor stalls

During the operation of the car, a frequent situation is that after turning the ignition key, the car starts up, the engine starts to work and stalls after a few seconds. As a rule, 3-5 seconds pass from the moment of starting to stopping. Before the motor has come to a complete stop, it is also noticeable power unit shakes, works very unstable.

This happens as a result of a decrease in speed, a resonant effect of a rotating one, etc. If you try to start the engine again, the motor may no longer start, or the situation described above may happen again.

The reasons for this problem are different. The main thing is that if the car starts up and stalls, this indicates that in-depth diagnostics are needed. Next, we will talk about what to do in such a situation, as well as how to find the reason why the engine stalls after starting.

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Engine Starts and Stops: Troubleshooting

So, if a similar problem manifests itself, then it is necessary to take into account a number of features. First of all, on ICE operation after launch, the following factors will affect:

fuel supply;
air supply;
spark on (for gasoline internal combustion engines);
correct operation (for diesel engines);
good work and electronic sensors;

Synchronous work valve train can be broken due to the fact that the timing belt or chain may be incorrectly installed, stretched, worn out and can jump on the pulleys. As a result, the opening and closing of the intake and exhaust valves does not match the engine strokes.

In this case, to eliminate the problem, it is necessary to check the indicated elements, by labels and perform other necessary procedures.

ECU malfunctions are less common, but this possibility should also not be ruled out. Additional attention should be paid to cases when the controller was flashed, executed, or installed on the car.

With regard to the various sensors, attention should also be paid to and, as well as the oxygen sensor in the exhaust system (lambda probe). If on the dashboard during a short-term start of the internal combustion engine, or if you do not see any signs of a problem, you still need to do it.

You can do the specified diagnostics yourself. To do this, you need an adapter, which will allow you to read error codes and display the information received on the screen of a tablet, laptop or smartphone.

What is the bottom line

As you can see, there are many reasons why the engine starts to work and stalls after starting. Moreover, most of them are usually associated with the fuel system, ignition system and electronic control system.

It is also important to consider that the occurrence piston rings can lead to certain difficulties during starting and to the stopping of the motor after the start of work. Less commonly, the problem occurs due to significant general engine wear.

In this case, it is appropriate to talk about due to the fact that the engine has exhausted its resource (cylinder walls, rings, etc. are worn out), that is, the unit needs overhaul... Compression can be measured at a service station or by yourself using a compression meter.

The reasons for the breakdown of the carburetor VAZ 2107

Here we will describe in stages all the possible reasons that the VAZ 2107 starts and stalls.

If the reason for the breakdown of the carburetor was the lack of fuel in the float chamber, then there is a high probability that the gas pump or the power system is also faulty. Just remove the hose from the fuel inlet fitting. After that, make a couple of clicks on the lever for manual fuel supply. Gasoline should flow out of the hose hole. If the jet was weak, or was absent altogether, then a detailed check of the gas pump and the power system must be carried out.

A clogged filter is also a common cause of carburetor breakdown. It will be very easy to fix this cause. You will need to remove the strainer and then clean it. For cleaning purposes, use a toothbrush, or something similar to it.

You can try rinsing the filter with acetone. A can of compressed air can also help. Blow it through the entire filter. Clean the filter seat. Sometimes it may be necessary to completely replace this part, but it is better to try to simply clean it.

Broken solenoid valve or idle fuel jet

First of all, you need to look at the position of the fuel jet and solenoid valve. As a result of some breakdowns, it may turn away, which is why a breakdown occurs. Just trust him. Also try removing the wire from the valve and putting it back on. You should hear a distinctive click. It indicates that the valve is working. If you do not hear a click, then connect the plus of the battery and the terminal of the valve. If you do not hear a click, then you will need to replace the valve. If there is a click, it is worth checking the EPHH system.

The serviceability of the valve can be checked by removing the fuel jet from it. Examine it carefully. It should be free of contaminated areas and damage. Look at the o-ring and lock needle. The jet should be thoroughly cleaned and blown out with compressed air.

This is a very widespread problem that will be difficult to fix. Because of it, the car does not always stall. This can happen if the fuel mixture is very much depleted of excess air. This is the reason why the carburetor starts up and stalls in the VAZ 2107. In this case, you need to check the entire carburetor.

Particularly susceptible to:

Ring under the valve;
Tube to vacuum cleaner;
Tube to valve cover;
Quality screw ring.

Sometimes it will be easier to replace the entire carburetor.

Diaphragm of the starting device is damaged

If the reason lies in the diaphragm of the trigger device, then it will have to be completely disassembled and viewed. Sometimes it may be necessary to completely replace the starter, but not often. It will need to be adjusted. Be sure to replace the diaphragm with a new one.

Clogged fuel and air jets

The emulsion wells and piping of the dosing system can also be clogged.

You will need to disassemble the carburetor, remove the above parts and clean them. For cleaning, use acetone, a brush and a can of compressed air. They must be cleaned of all visible contamination. It is worth noting that in the Solex and Ozone systems, the components will be the same. Only their location differs.

Cleansing requires:

Air jets;
Emulsion tubes;
Fuel jets;
Emulsion wells.

All components must be cleaned, even if some of them are not heavily contaminated. This will help avoid re-breakage.

Clogged fuel and air jets of the idle system

Clogging of these sections of the carburetor can also cause the VAZ 2107 to start and immediately stall. In this case, you will have to disassemble them. This is easy enough to do, you just need to carefully unscrew the jets. Next, you need to clean them and blow them with compressed air. Sometimes they may need to be replaced. You can try cleaning the jets without having to completely disassemble the carburetor. This will significantly reduce the cleaning time.

The fuel level in the float chamber is violated

This is a very common reason why the carburetor stalls in the VAZ 2107. This is due to improper adjustment of the fuel level. The fact is that the fuel mixture is disturbed. It can be highly enriched, or vice versa depleted. In this case, adjustments need to be made. It may take a long time, but this will avoid carburetor malfunctions.

Suction not adjusted

Due to the fact that the choke may not be fully open, the fuel can be enriched. Most often this does not lead to serious problems, but sometimes the fuel is enriched so much that the engine is very difficult to start. Especially if it has been heated up by a long ride. In this case, it is worth adjusting the air damper (suction). Sometimes a highly enriched mixture can even flood candles.

With proper operation of the air damper, it should overlap the section of the right chamber. This happens when the handle is fully extended. And if the handle is recessed, then it should stand up vertically. If this does not happen, then the reason for the breakdown of the carburetor lies precisely in the incorrect adjustment of the suction. It shouldn't take you long to adjust.

Other reasons why the VAZ 2107 stalls

VAZ 2107 can stall not only because of the carburetor. This may be due to breakdown of other systems. First of all, pay attention to the ignition system. Its breakdown can often be confused with a breakdown of the carburetor. This is because the symptoms of a malfunctioning ignition system are very similar to those of a carburetor malfunction. You also need to check the power system. It can also be the reason that the VAZ 2107 starts up and immediately stalls.

conclusions

Most of the above causes of breakdowns can be eliminated by yourself. To do this, you just need to clearly follow the instructions. Most often, you just need to clean some parts of the carburetor, but sometimes you may need to completely replace the carburetor in a VAZ 2107 car. So you will quickly get rid of many problems associated with the fact that your car starts up and immediately stalls.

Hello everyone today I want to talk about the reasons why your VAZ 2107 car stalls, and due to this unpleasant annoyance, you can no longer continue driving on your iron horse. Today we will try to consider the main reasons why your engine stalls. Of course, unfortunately, there are a lot of such reasons.
The first reason is problems with the regulator. idle move(IAC) usually the car stalls at idle speed. Pxx can fail due to contamination, and this leads to the fact that the stem wedges. To make sure you need to remove the IAC from the seven and rinse thoroughly in case of contamination. It is advisable to use a liquid that washes away the oil well.

The second reason due to which the VAZ 2107 stalls is the alarm (if, of course, it is installed), in most cases the alarm works with the electric circuit of the gasoline pump, but where does this ask you? And besides, the unscrupulous mechanic who connected the alarm to you could do his job poorly from here and problems may follow. Moreover, if they did everything on twists, then over time it weakens, and everyone write letters, as they say. Power to the pump ceases to flow, as a result of which the VAZ 2107 will not start.

The third reason is that the fuel mixture is too rich. You can check this version by unscrewing the candles, if the contacts of the candles are covered with black carbon, this means that the mixture is too rich. For how much gasoline is supplied to the cylinders, the position is responsible throttle, as well as the readings of the temperature sensor, on a VAZ 2107 car, this sensor is located on the left in the back of the block head. If it becomes necessary to replace the temperature sensor, then you will have to drain some, then part of the antifreeze.
Failure of the mass air flow sensor (DMRV) on the VAZ 2107 also leads to an enrichment of the mixture. You can check the operation of the DMRV using a multimeter. If the voltage is more than 1.002 volts, then it will have to be replaced.

The fourth reason is the strong depletion of the combustible mixture. As a result, your "Seven" will also stall. This is mainly due to air leaks. The main places of suction are the gaskets of the intake system, or loosening of the fastening in the places where they stand. To find air leaks, a smoke generator is usually used to see where the smoke is being drawn in.

And the fifth reason is vacuum amplifier brakes. Since air leaks can also pass through it. This happens due to a leaky diaphragm. You can determine a faulty vacuum tank on a VAZ 2107 by pinching the hose that connects the vacuum amplifier and the intake manifold, if the engine does not stall, then most likely you will have to change the vacuum tank.

Well, that's all we have considered the main reasons why the VAZ-2107 car stalls, if you had other reasons, then write in the comments. Goodbye to everyone.

Situations when the VAZ injector starts up immediately, after which it immediately stalls, arise quite often. And all because of the fuel injection system (forced type). To remedy this situation, car owners often use a heating plug, but this is not a solution to the problem, but only a temporary measure. If the VAZ 2107 starts up and stalls immediately after turning the key in the ignition lock, then in most cases this indicates a problem in the delivery of fuel (the fuel pump is clogged or does not work properly), or the quality of the fuel used leaves much to be desired, and the nozzles are simply clogged. And the car starts only on the remains of fuel in the cylinders.

Finding the defective component

So, what should you do if the engine starts easily, but after that it immediately slows down and stalls? The first step is to check for carbon deposits on the candles. If some of them are covered with a layer of carbon, then the engine a priori cannot work normally. It first starts up due to the movement of the starter, but immediately after that it slows down, since several cylinders physically cannot withstand the entire load from crankshaft... The carburetor, by the way, can also fail due to such a problem.

So what is the cause of the engine malfunction? If the car starts, then at least the spark is fine. That is, the electrician works as expected. It will not be superfluous to unwind the heads and try to find those candles that are covered with a layer of carbon. You can clean them by burning them over a gas burner and cleaning alcohol (this can be done only when the contacts are cold).

The injector itself can also become clogged. In this case, the fuel supply to the combustion chamber simply does not work. The following actions should be performed:

remove the blocks and check the dampers;
check the operation of the sensors;
check if the engine runs normally at temperatures above 80 ° C.

Naturally, the fuel pump itself can malfunction. At the time of starting the engine, it turns into the injector automatically due to the starter, and then there is traction from the generator. If one of these components does not work properly, the car will simply stall. Here again we are talking about the residual fuel quantity in the cylinders. If the engine immediately stalls, and the starter works unevenly with it, then, most likely, the problem is either in it or in the ignition lock.

You should try to replace it with a known good one and retest the engine operation. In extreme cases, the contacts are simply clamped.

What if the problem is in the ECU?

The engine may not work properly if the on-board computer malfunctions. In VAZ, it is he who is responsible for the timely supply of fuel, synchronization of the operation of the injector injector and spark plugs. When the engine immediately stalls, this indicates a mismatch between the timing of the fuel supply and the ignition of the fuel mixture.

As a rule, changing the firmware or restoring it to the factory state helps. Although sometimes it may simply be necessary to adjust the fuel supply cycle, as well as the saturation of the mixture. In extreme cases, on a VAZ 2110 (or a later model), you will have to replace the entire ECU unit or turn it off, putting the engine into operation only from mechanics.

It should be noted that not only the ECU itself is responsible for the operation of the engine, but also a bunch of sensors that regulate the pressure in the injector, the saturation of the mixture, and the ignition moment.

That is, you need to check their work. Although, when a malfunction of one of them is detected, a signal should be given Check Engine on dashboard... This, for example, happens when the VAZ 2110 starts up. This does not happen only if the ECU simply does not receive signals from the sensors. It is worth noting that in the 2107 model, the computer is not installed by default, but the injector does not work without it.

Similar problems arise when the carburetor is synthetically altered for an injector, but the same on-board computer remains. They just change the firmware, connect new modules, but you need to understand that it was not originally designed for such work. Thus, if the carburetor is altered, then along with it, the ECU must be changed to a compatible model. Fortunately, VAZ took care of their release.

So, if the injector starts up and immediately stalls, then the main reasons for such a malfunction are malfunctions in the operation of the electronics (including the computer), improper operation of the fuel system, or problems with filtering gasoline. It is not a problem to identify the root cause. As a last resort, you can always contact the service station center. But it is worth remembering that any adjustments to work on-board computer can only be inserted with a fully functional engine.

What to do if the VAZ injector starts up and stalls at idle speed? Most of all, this problem concerns old cars, as with age, various pollution accumulates in fuel system and in, as well as sensors and mechanisms wear out - all this will inevitably lead to changes in the operation of the engine.

Let us describe in order all the reasons that lead to this problem.

First of all, the mass air flow sensor (MAF) is subject to verification. The sensitive element of the sensor becomes dirty and wears out with age, which is why its resting stress increases, as well as its reaction time to changes in the air flow increases. If the quiescent voltage of 1.035V is exceeded, it is worth thinking about replacing the sensor, because it will no longer be able to give overestimated readings for air flow. The electronic control unit will supply a larger amount of fuel and the mixture will be re-enriched - and this will have a very bad effect on all engine operating modes, as well as on the stability of idling.
The idle speed control (IAC) can also affect engine stability. Stem wedging is the most typical malfunction in him. In addition, with age, the components of the regulator naturally wear out, and this leads to problems with movement. The usual service life is 100-150 thousand km. Only with the help of special equipment can you check the IAC, and it is better to replace it with a new one immediately if you suspect a malfunction.
Very often it is enough to simply clean the throttle assembly from dirt. It's easy to do it yourself. These are the most basic cases that you must pay attention to. Atypical situations will follow.
Sometimes the problem is a leak in the intake manifold. It is necessary to check the gaskets, vacuum hoses, injector O-rings, and the vacuum brake booster and manifold plugs. The easiest way to find air leakage is a smoke generator.
Pay attention to fuel pressure.
You also need to check the ignition system and the spark plugs in particular.

In conclusion, it should be noted that without special equipment, a complete system check is impossible. Only with its help can you accurately identify a malfunction.