Here we will analyze in detail all the possible reasons why the carburetor stalls in a VAZ 2107 car. In most cases, the breakdown can be fixed on your own, but sometimes a complete replacement of the carburetor is required.
If you notice some of these phenomena in the operation of a VAZ 2107 car, then you should carefully check the carburetor. Perhaps you will find a breakdown in it.
- If the VAZ 2107 starts up and immediately stalls, the carburetor may be the cause. All subsequent attempts to start the engine will be ineffective.
- In cases where the engine is difficult to start, the carburetor should also be checked. The car may stall after a short period of time.
- If the engine stalls immediately after starting, this is also a sign of a malfunctioning carburetor. The engine will stall several times, and only after numerous attempts, you will be able to start the VAZ 2017.
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 cause of 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 taps 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 fuel pump and the power system must be carried out.
A clogged filter is also a common cause of carburetor failure. It will be very easy to fix this cause. You will need to remove the strainer and then clean it. For cleaning purposes, you should 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 battery plus and the valve terminal. 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 EPHC 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.
Especially prone 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 may 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 dirt. It should be noted that in the Solex and ozone systems, the components will be the same. Only their location differs.
Cleaning 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. It's 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 completely disassembling the carburetor. This will significantly reduce 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, 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 it.
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 damage 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.
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 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 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 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. You should do the following:
- 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 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 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 nozzle 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 delivery cycle, as well as the saturation of the mixture. In extreme cases, on a VAZ 2110 (or 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 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 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 only be made 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. The malfunctions of carburetors 2105, 2107 Ozone, 2108, 21081, 21083 Solexi of their modifications will be considered.
Malfunction symptoms
— The engine starts, runs for a few seconds and stalls, repeated starts are ineffective.
- The engine starts up with difficulty, after working 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.
Reasons for 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.
carburetor starting devices 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.
On the Solex carburetor, turn out the air jets, 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 you need to go through the most obvious options.
- Out of gasoline (diesel). As paradoxical as it may sound, drivers often forget to monitor the fuel level in the tank.
- On diesel engines (especially in winter), frozen fuel can cause the car to start and almost immediately stall.
- The quality of gasoline at filling stations is often appalling, 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 a full tank is filled, then it is better to drain the surrogate away from sin.
- Worn wires and old (faulty) plugs are also very common causes.
- Compression of the 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.
The injector starts and stalls
Injection vehicles can behave this way due to a malfunctioning fuel pump. It is in the tank. It is very easy 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. 
Severe contamination of the fine fuel filter can also lead to the car stalling after starting. The filter simply does not have time to pass the required amount of gasoline.
ECU errors often lead to problems with starting the engine, not receiving signals from certain sensors, or receiving them in a distorted form. It is best to diagnose such breakdowns in specialized services.
Why carburetor cars start and stall
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 needs to 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, you should remember that any unconscious manipulations can lead to a large increase in fuel consumption.
Another reason why the engine stalls is that the mesh filter in the carburetor in front of it is clogged. If the car starts 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, along with the filter, clean the slot into which it is inserted. 
It happens that in VAZ cars, a few seconds after starting, the speed drops due to a malfunction of the electromagnetic valve. The check is carried out as follows: the valve is unscrewed, power is supplied to the positive contact, and the housing 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 the click is not heard, 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 that 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 vehicle's engine speed drops, clogging can affect the stability of the vehicle. To clean the jet, it is necessary to create an increased vacuum in the system channels.
To do this, we start the car and raise the rpm to 3000. We turn out the jet holder (solenoid valve) for a few turns. This allows you to create the required vacuum in the channels. We repeat the procedure several times.
Other reasons for the improper start of the VAZ 2107 engine
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 breach.
It happens that the nozzles and nozzles of the dosing system become 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.
Adjusting the fuel level in the float chamber (Solex carburetors)
In addition to all of the above, engine speed falls if the fuel level in the carburetor (float chamber) is incorrectly adjusted. 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:
- remove the air filter housing by unscrewing all fasteners;
- remove the carburetor cover;
- 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 catching the walls of the chamber in which they are located. It will not be superfluous to measure the distance from the protrusions 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 normal? 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.
