Vaz 2107 starts up and immediately stalls for reasons. The car's carburetor engine starts and stalls. What to do if the problem is in the ECU

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 idle speed regulator (IAC), usually the car stalls at idle. 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 of the throttle valve, as well as the readings of the temperature sensor, is responsible; 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 the vacuum brake booster. 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.

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 stops completely, the power unit is also shaking, it is 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.

Read in this article

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, the following factors will affect the operation of the internal combustion engine after launch:

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

• Synchronous operation of the valve train can be disrupted due to the fact that the timing belt or timing chain may be incorrectly installed, stretch, wear 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 no signs of malfunction are visible, 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. However, most of them are usually associated with the fuel system, ignition system and electronic control system.

It is also important to take into account that the occurrence of piston rings can lead to certain difficulties during starting and to stopping the motor after starting 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 worked out its resource (cylinder walls, rings, etc. are worn out), that is, the unit needs major repairs. Compression can be measured at a service station or by yourself using a compression meter.

Read also

The engine stalls at idle: what to check. Possible causes of malfunction on engines with a carburetor, injector, diesel power plants.

At idle speed "float" revolutions: why is this happening. The main malfunctions associated with idling on a gasoline and diesel engine.

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 correct this situation, car owners often use a heating candle, but this is not a solution to the problem, but only a temporary measure. If the VAZ 2107 starts 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 gas pump is clogged or does not work correctly), or the quality of the fuel used leaves much to be desired, and the nozzles are simply clogged. And the car starts exclusively on the remains of fuel in the cylinders.

Finding the faulty 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 the 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 everything is fine with the spark. 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 is automatically turned into the injector by the starter, and then there is a thrust 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 with it the starter also works unevenly, 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 malfunction 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, if a malfunction of one of them is detected, a Check Engine signal should be sent to the 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 redesigned 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 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. In extreme cases, you can always contact the service station center. But it is worth remembering that any adjustments to the operation of the on-board computer can be made only with a completely serviceable engine.

In this article, we will take a closer look at the situation when the carburetor engine of a car (VAZ 2108, 2109, 21099, 2105, 2107 and their modifications) starts and stalls due to a carburetor malfunction. Malfunctions of carburetors 2105, 2107 Ozone, 2108, 21081, 21083 Solexi of their modifications will be considered.

Malfunction symptoms

— The engine starts up, runs for a few seconds and stalls, repeated starts are ineffective.

- The engine starts up with difficulty, after running for a short time it stalls, after restarting it starts and runs.

- The engine starts up and immediately stalls, starts up again and stalls again and so on several times, but then it still starts to work.

Causes of malfunction

There is no fuel in the float chamber

Pump it up with the manual priming lever on the gasoline pump.

The diaphragm of the starting device is damaged or it is not adjusted

Disassemble the body of the starting device, replace the diaphragm with a new one. Adjust the starting device.

starting devices for carburetors 2108, 21081.21083 Solex, 2105, 2107 Ozone

Clogged fuel and air jets, emulsion wells and main metering system pipes

It is necessary to remove the carburetor cover, unscrew the jets, remove the tubes, rinse and clean them, clean the wells, blow everything with compressed air and put it back. The image shows that it is worth cleaning the carburetor 2105, 2107 Ozone.

Unscrew the air jets on the Solex carburetor, take them out together with the emulsion tubes. There are fuel jets at the bottom of the opened wells. We turn them out with a thin long slotted screwdriver. We clean, rinse with acetone and blow with compressed air.

fuel and air jets, emulsion tubes and emulsion wells GDS carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone

Clogged fuel and air jets and channels of the idle system

Unscrew the nozzles, rinse and clean them, blow with compressed air.

air and fuel jets of CXX carburetors 2108 Solex and 2105, 2107 Ozone

The fuel level in the carburetor float chamber is broken

The fuel mixture is either very lean or very rich as a result of improper adjustment.

approximate fuel level in the float chambers of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone

Articles on the site about fuel level adjustment:

The carburetor air damper drive is not adjusted ("suction")

Owners of VAZ 2107, 2110, 2112, 2114, and other cars, may face a problem - the car starts up and immediately stalls. The engine starts, but after a few seconds the rpm drops and the engine stalls. Consider the possible causes of a startup malfunction, and how to fix them.

First, let's look at the most common problems.

1. Out of gasoline (diesel)... As paradoxical as it may sound, drivers often forget to monitor the fuel level in the tank.
2. On diesel engines(especially in winter) the reason that the car started up and stalled almost immediately could be frozen fuel (but as a rule, diesel VAZs are a rarity).
3. Gasoline quality at gas stations, it is often terrifying, so if you fill a car with low-quality fuel, you can face the problem of a stalling engine. If there is little bad gasoline, you can dilute it with good gas. But if the tank is full, then it is better to drain the surrogate out of harm's way.
4. Worn wires and old (faulty) spark plugs are also very often the cause.
5. Compression engine, or rather its absence, can provoke a situation in which the engine stalls barely having time to "pick up". But this is already a very serious breakdown, the appearance of which is accompanied by a host of other symptoms, which are simply impossible not to notice during the operation of the car.

An interesting article about biofuels made from ordinary sawdust, in more detail .

VAZ with an injector start up and suddenly stalls

A few reasons:

1. Injection vehicles may behave this way due to a malfunctioning fuel pump.... It is in the tank. It is very simple to check its performance. If you turn the ignition key to the first position and listen, you will hear how the pump works, pumping gasoline into the system.
2. Heavy contamination of the fuel filter fine cleaning can also cause the car to stall after starting. The filter simply does not have time to pass the required amount of gasoline.
3. ECU errors quite often lead to problems with starting the engine, not receiving signals from certain sensors, or receiving them in a distorted form. Diagnostics of such breakdowns is best done in specialized services.

The reasons why carburetor cars start and stall

1. If the car starts up and immediately stalls, then the problem may be due to the lack of fuel in the float chamber.... You can try to manually pump up the fuel pump. It must be checked for operability, and, if necessary, replaced. Before you engage in self-cleaning of the power system in general and the carburetor in particular, it should be remembered that any unconscious manipulations can lead to a large increase in fuel consumption.
2. Another reason why the engine stalls is that the mesh filter in the carburetor is clogged in front of its entrance.... If the car starts up and stalls after a few seconds because of this filter, then it must be cleaned and rinsed. To do this, use a toothbrush and thinner (gasoline or acetone). After that, immediately, together with the filter, clean the slot into which it is inserted.
3. It happens that in VAZ cars, a few seconds after starting, the speed drops due to a malfunction of the solenoid valve... The check is carried out as follows: the valve is unscrewed, power is supplied to the positive contact, and the body is closed to the motor ground. If the valve is working properly, a distinct sound will be heard, and the needle will enter the body.

You can just connect the wire to the valve and put it in place. If you do not hear a click, the valve is faulty. We unscrew the valve and take out the jet from it. If it is bent, it needs to be replaced. Make sure the valve stop needle moves freely and that the valve gasket is not torn and that it fits snugly against the body.

If there is a click of the valve, then it is necessary to diagnose the EPHC system. The idle fuel jet may need to be cleaned. If a car's engine speed drops, clogging can affect stability. To clean the jet, it is necessary to create an increased vacuum in the channels of the system.

To do this, we start the car and raise the rpm to 3000. Turn the jet holder (solenoid valve) by a few turns. This allows you to create the required vacuum in the channels. We repeat the procedure several times.

What else can there be breakdowns of the VAZ 2107

Another common problem due to which the engine of VAZ 2107 cars starts and stalls is excess air entering the carburetor... In this case, the fuel mixture cannot keep the engine running for a long time, and although the car starts up, it stalls after a few seconds. It is necessary to determine the place of air leakage and eliminate the gap.

It happens that the nozzles and nozzles of the dosing system are clogged... This also affects the drop in engine speed, so that the VAZ 2107 stalls after a few seconds. What to do in this case? It is necessary to unscrew the jets and pipes under the carburetor cover and clean them. After that, blow out the wells and jets with compressed air. If you have a Solex carburetor, then you also need to clean and blow the fuel jets located at the bottom of the wells.

Solex carburetor problems

In addition to all of the above, engine speed drops if the fuel level in the carburetor is incorrectly adjusted (float chamber). As a result, there is either insufficient or too much gasoline in the fuel mixture. When adjusting the VAZ 2107 carburetor, it does not need to be disconnected from the engine.

Follow these steps:

1. remove the air filter housing by unscrewing all fasteners;
2. remove the carburetor cover;
3. check the position of the floats. To do this, breed and bring them together to achieve the correct location.

It is necessary to achieve such a position of the floats so that they move freely without clinging to the walls of the chamber in which they are located. It will not be superfluous to measure the distance from the projections on the floats to the paper pad. The distance should be within 0.75–1.25 mm. Use a dipstick to measure.

What if it is far from the norm? In this case, you need to adjust the height of each of the floats.

As we have seen, there are not so few reasons why the engine stalls. To start the engine correctly, you need to check and eliminate all of the above malfunctions. After that, if the problem has not been resolved, you will have to contact the specialists.