Here we will analyze everything in detail possible reasons, through which the carburetor stalls in a VAZ 2107 car. In most cases, the breakdown can be fixed on your own, but sometimes it will be necessary complete replacement carburetor.

If you notice some of these phenomena in the operation of a VAZ 2107 car, then you should carefully check the carburetor. You may find it broken.

• If the VAZ 2107 starts and immediately stalls, the carburetor may be the cause. All subsequent attempts to start the engine will be unsuccessful.
• In cases where the engine is difficult to start, the carburetor should also be checked. The vehicle may stall after a short period of operation.
• If the engine stalls immediately after starting, this is also a sign of a carburetor malfunction. The engine will stall several times, and only after numerous attempts, you will be able to start the VAZ 2017.

Causes of 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 carburetor failure was the lack of fuel in float chamber, then it is likely that the fuel pump, or the power system, is also faulty. Simply 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 completely absent, then a detailed check of the fuel pump and power system should be carried out.

Filter clogging is also common cause carburetor breakdown. Correcting this cause will be very easy. 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 cleaning the filter with acetone. A spray bottle may also help. compressed air. Blow out the entire filter. Clean the filter seat. Sometimes it may be necessary to completely replace this part, but it's better to just try to clean it.

Breakage of the solenoid valve or fuel jet of the idle system

First of all, you need to look at the position of the fuel jet and solenoid valve. As a result of some breakdowns, it can 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 characteristic click. It indicates that the valve has earned. If you do not hear a click, then connect the battery plus and the valve outlet. If you do not hear a click, then the valve will need to be replaced. If there is a click, it is worth checking the EPHH system.

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

This is a very broad problem that will be difficult to fix. Because of it, the car does not always stall. This may happen if fuel mixture very depleted of excess air. This is the reason why the carburetor starts 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 the vacuum cleaner;
• Tube to valve cover;
• Ring on the quality screw.

Sometimes it will be easier to replace the entire carburetor.

Starter diaphragm damaged

If the reason lies in the diaphragm of the trigger, 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 tubes of the dosing system may also be clogged.

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

Cleaning required:

• Air jets;
• emulsion tubes;
• Fuel jets;
• emulsion wells.

All components must be cleaned, even if some of them are not very dirty. This will help prevent 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 to clean the jets without having to completely disassemble the carburetor. This will greatly reduce cleaning time.

Violated fuel level in the float chamber

This is a very common reason why the carburetor stalls in the VAZ 2107. This is due to incorrect fuel level adjustment. The problem is that the fuel mixture is broken. It can be highly enriched, or vice versa depleted. In this case, you need to make an adjustment. It may take a long time, but this way you can avoid carburetor malfunctions.

Suction not adjusted

Because of air damper may not be fully open, the fuel may 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 fill candles.

With the correct operation of the air damper, it should block the section of the right chamber. This occurs 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. Adjusting it shouldn't take you long.

Other reasons why the VAZ 2107 stalls

VAZ 2107 can stall not only because of the carburetor. This may be due to a breakdown in other systems. First of all, pay attention to the ignition system. Its failure can often be confused with a carburetor failure. This is because the symptoms of a faulty ignition system are very similar to those of a faulty carburetor. Still 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 independently. To do this, you just need to strictly follow the instructions. Most often, you only need to clean some parts of the carburetor, but sometimes you may need to completely replace the carburetor in a VAZ 2107 car. This way you will quickly get rid of many problems associated with the fact that your car starts and immediately stalls.

Situations when the VAZ injector starts up immediately, after which it immediately stalls, occur quite often. And all because of the fuel injection system (forced type). To correct 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 and stalls immediately after turning the key in the ignition, then in most cases this indicates a problem in the delivery of fuel (the fuel pump is clogged or not working properly), or the quality of the fuel used leaves much to be desired, and the nozzles simply clogged. And the car starts exclusively on the remnants of fuel in the cylinders.

Finding a defective component

So, what should be done 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 soot, then the engine a priori cannot work normally. It first starts due to the movement of the starter, but immediately after that it slows down, since several cylinders cannot physically 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 engine failure? If the car starts, then at least the spark is fine. That is, the electrical 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 soot. You can clean them by burning them over a gas burner and cleaning with alcohol (this can only be done 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 take the following actions:

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

Naturally, the fuel pump itself can fail. At the time of starting the engine, it turns into the injector automatically due to the starter, and then comes the thrust from the generator. If one of these components does not work properly, the machine will simply stall. Here again we are talking about the residual amount of fuel 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 switch.

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 to do if the problem is in the computer?

The engine may not work properly if the on-board computer fails. In the VAZ, it is he who is responsible for the timely supply of fuel, the synchronization of the operation of the injector nozzle and spark plugs. When the engine immediately stalls, this indicates a mismatch between the moment of fuel supply and 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 cycle, as well as the saturation of the mixture. In extreme cases, the VAZ 2110 (or later model) will have to replace the entire ECU unit or turn it off, putting the engine into operation mode 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 nozzle, mixture saturation, ignition timing.

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

Similar problems arise when the carburetor is synthetically converted into an injector, but the old on-board computer is left. They simply change the firmware in it, connect new modules, but you need to understand that initially it was not designed for such work. Thus, if the carburetor is reworked, then the ECU must also be changed to a compatible model along with it. Fortunately, VAZ took care of their release.

So, if the injector starts and immediately stalls, then the main causes of such a malfunction are malfunctions in the electronics (including the computer), improper operation of the fuel system, or problems with gasoline filtering. Finding the root cause is not a problem. In extreme cases, you can always contact the service center. But it is worth remembering that any adjustments to the work on-board computer can only be applied when the engine is in perfect working order.

Are you familiar with the situation, dear friends, when the car engine is idling unsteadily? Many will say - "Something with the carburetor." I agree, but what exactly? I will not torment, in most cases, it is necessary - to perform idle adjustment. Of course, if available modern car, then its owner usually does not look further than the salon, the good old "classic" is another matter. Each of its owners is trying to master the entire device of the unit as much as possible, because cutting through the expanses of mother Russia, anything can happen and you need to be prepared both theoretically and practically.

Setting up a carburetor is not an easy task and it is best to entrust it to professionals, but it’s not for me to tell you about the Russian mentality. We do not want to pay some uncle when we can do everything ourselves, they will suffer, but do it! Self adjustment idle move VAZ 2107 will save time and money that you spend in a car service. Moreover, such a skill is especially useful in non-standard situations away from home. With this publication, I will prove to all pessimists that everyone can directly adjust the idle speed with their own hands.

Foreshadowing adjustment

Before proceeding with the operation, it is necessary to make sure that the unstable operation of the engine is caused precisely by an incorrectly set idle speed. You need to check the following points:

• Jets for clogging;
• Correctly set ignition angle;
• The quality of gasoline;
• Fuel level in the float chamber;
• The tightness of the starting sensor;
• performance of glow plugs.

If all of these points are normal, and nothing has changed with the car, then you were right, the reason is idling. However, it is necessary to start its adjustment exclusively in the working condition of the described mechanisms. After warming up the engine to operating temperatures (pay attention to the air damper, it must be in the open position), you can proceed to the procedure.

Setting up with additional devices

Having obtained a multimeter and a gas analyzer, the adjustment results will be similar to those achieved by car service specialists.

1. Adjust correct angle ignition with a multimeter (connected to the distributor coil) and fix the distributor.
2. Insert the gas analyzer into exhaust pipe and start the car.
3. The screw for the amount of the mixture (indicated in the figure by the number 1), is set in such a position that the rotation of the crankshaft is within 840-960 rpm.
4. We look at the gas analyzer, if the CO value is exceeded, we adjust the quality of the mixture (number 2 in the figure).
5. After that, the rotation of the crankshaft will decrease slightly, repeat step 3.
   The last points are repeated until the values ​​are at least a little like the factory settings. To check, you need to sharply press the gas pedal several times and release it. With the right setting, the speed is gained smoothly and quickly, and is reset automatically and without breaks.

Adjustment without additional devices

If it was not possible to find special devices, it is possible to carry out adjustment without a gas analyzer, but only with a tachometer. The procedure is basically the same, only the screws need to be twisted a little differently.

1. We set the mixture quantity screw in the position of the nominal crankshaft speed (820/900 rpm).
2. We catch the maximum speed with the quality screw.
3. We increase the crankshaft speed to 950-1035 rpm (15%), using the quantity screw.
4. We check the quality screw, it should be in the maximum position possible turnovers for the current location of the quantity screw.
5. We repeat steps 3 and 4 until, after completing the third step, adjusting the quality screw will only lead to a decrease in speed.
6. We twist the quality screw to the nominal speed.

The correctness of the procedure performed can be checked by removing the terminal from the solenoid valve, the engine should stall. If this does not happen, then most likely the throttle valve is ajar, which is regulated by controversial screws. Please note that in the cold season it is recommended to set the idle speed in the range of 900-1000 rpm, and in the warm season - 800-900 rpm.

Conclusion

As you yourself saw, the carburetor is a complicated thing, but you don’t need to special mind to adjust the idle speed. Do not try to repeat the procedure if your "seven" is on gas, the process will be meaningless because the carburetor does not work with this type of fuel. You can try to set up the injector, but there is a high probability of only harming the device in the way that the described actions are ineffective there, so it is better to turn to professionals. All the procedures described and not only are clearly demonstrated in the video, where a cheerful specialist easily and simply finds a common language with a carburetor. I wish you the same, all the best!

The stable operation of the VAZ 2107 car engine depends on the serviceability and correctness of the settings of its systems. Idling mode adjustment is possible without the involvement of specialists, provided that all recommendations of the operation manual are followed. A serviceable carburetor with a correctly set ignition timing and gaps between the contacts of the distributor.

Adjustment of the mode according to the technical documentation must be carried out using a device that determines the level of CO in the exhaust gases. V garage conditions the carburetor is usually adjusted by eye and by the built-in tachometer. The description prescribes a crankshaft speed between 700 and 900 rpm. At lower values, the carburetor systems are unable to ensure stable operation of the engine, at higher values, fuel consumption increases.

Diagnostics of engine systems

The power unit of the VAZ 2107 car runs on gasoline, while the quality and composition of the fuel do not always meet the requirements of the standard. A clogged carburetor, particularly the idle system, can lead to erratic operation. Depending on the degree of contamination, the manifestations may be different up to the spontaneous stop of the motor.

The main reasons for the unstable operation of the VAZ 2107 car engine when idling:

1. incorrect fuel level in the float chamber;
2. blockage mesh filter, jets and channels;
3. restriction or difficulty in valve travel in the EPHH;
4. air suction through damaged gaskets, membranes or tubes;
5. blockage air filter;
6. burning contacts or incorrect gap between them;
7. substandard candles;
8. incorrect adjustment of the ignition timing.

Before you start setting up the carburetor, you should restore its performance, otherwise it is impossible to achieve a sustainable result.

Maintenance and Troubleshooting

Routine work on systems that ensure the operation of the engine should begin with its complete inspection. For convenience, the air filter housing is removed from the carburetor and all air tubes are inspected. They should not have cracks, and the material should retain elasticity. If necessary, the carburetor is dismantled and completely disassembled with fault detection and replacement of defective parts.

At the next stage, diagnostics are performed, the identified malfunctions are eliminated and the ignition system is adjusted. It is recommended to clean the contacts in the distributor with fine sandpaper, replace the candles and set the lead angle correctly. This can be done with a tester or a primitive test lamp. Going directly to the regulation of the VAZ 2107 engine makes sense only if the carburetor and other systems are put in order.

Setting up the power unit

Idle speed adjustment is carried out in a well-ventilated room or outdoors. It is necessary to make sure that the air damper is fully open, for which the handle is sent forward until it stops. Now the carburetor is completely ready for setting the mode.

The sequence of actions of the wizard is as follows:

1. A device sensor is inserted into the exhaust pipe, which determines the concentration of carbon monoxide in the exhaust. The device is turned on, and readings are taken from it, which characterize the operation of the carburetor.
2. If the set parameters are exceeded, the mixture quality screw is tightened with a screwdriver. This action is performed in several stages with constant exhaust control.
3. The drop in idle speed is compensated by the fact that the VAZ 2107 carburetor is adjusted by the mixture amount screw.

The procedure continues until the engine runs stably in this mode. In the absence of a device, the adjustment of a working carburetor on a VAZ 2107 car can be done without it. With a certain skill, this operation will not take much time.

Idle adjustment without gauge

Most experienced craftsmen and drivers configure the VAZ 2107 power unit as follows:

1. The carburetor mixture quality screw sets the minimum speed at which the engine is unstable, but does not stall.
2. The rotational speed is increased by adding the mixture.

The procedure with the mixture quality screw is repeated until the carburetor ensures stable engine operation.

In practice, this method is used quite often and with sufficient driver experience, a positive result is guaranteed.

VAZ (Lada) 2107 1982 - 2013

VAZ 2107 carburetor. Recently, the car began to twitch at first when driving, then it began to stall. Changed the fuel pump, put the baker, still the car stalls. I replaced the stock, the old one was with development, the same thing. I installed a new fuel filter, no change, continues to stall. I pump it up manually.

It seems to me that the point is fuel system, because with manual pumping it immediately starts, but I noticed when I shake it with my hand, it seems like gasoline goes into the filter with air. Could it be that somewhere the air cuts and therefore, under load, the pump sucks in fuel with air and therefore stalls?

You should overhaul the carburetor. Start for a few minutes, turn off, disconnect the filter. And be sure to disconnect the fuel supply hose. Only then carefully unscrew and carefully remove the upper part of the carburetor upwards. This way you will know exactly what level is in the float chamber, it should be 7-10 mm higher than the lower fuel jets. Not higher and not lower. On the question and on the comments, I realized that you either have a poor mixture of food, or it overflows into a turnover. Carbon deposits on candles, on what color electrode insulators?

May be. The car is not new, it is quite possible that the highway is rusted somewhere. Yes, and the hose between the line and the tank is not new, between the pump and the line too. Stock. The stem is not easy to change, it also needs to be adjusted.

I already did that. This afternoon, I specifically drove until it stalled. I disassembled the carburetor, in the float chamber the level was below the channels on the jets. That is, the carburetor sucked out the fuel, but a new portion did not arrive. Removed the hose, spun the engine, gasoline did not go. I removed one gasket, the car seems to have gone, but dips are still felt. I will try to adjust the stroke of the stock. Everything was replaced, blew, adjusted, there should be no complaints about the fuel system.

Welcome!
Idling - Over time, a person who uses a car with disturbed idling decides to adjust it, because as we all know, if the idling is too low, the engine will stall from time to time, and if it is too high, then the fuel consumption of this the engine increases and then you have to look for the middle ground, as they say.

But in order to find this middle ground, you first need to learn how to adjust the idle speed on a car, and not all people know how to adjust the idle speed. Therefore, today we will analyze the issue of idle speed adjustment on cars of the "Classic" family.

Note!
All you need is a single screwdriver to adjust!

Summary:

Idle adjustment tips:
Firstly, the adjustment must be carried out at the operating temperature of the engine (90-95 ° C), and also during the adjustment, the air filter must be installed on the car.

Secondly, when adjusting the idle speed, the fuel level that is in the carburetor float chamber must be adjusted.

Thirdly, the valve clearances must also be adjusted and the ignition timing of the car must be adjusted.

Fourth, the air damper must be fully open when adjusting the idle speed, you can check this by removing the roof from the air filter housing and, as a result, looking at the damper.

Fifthly, adjusting the idle speed of a car is not always easy for a beginner, because adjusting the rotation of the crankshaft and adjusting the content of carbon monoxide (CO) must be done together.

Note!
For a more accurate idle speed adjustment, it is necessary to use the "Gas Analyzer" which most owners do not have at all. But the adjustment can also be made without this device, but only it will be more difficult! (How to adjust without this device, see the heading: "")

How to adjust idling on a VAZ 2101-VAZ 2107?

Before proceeding to the adjustment, familiarize yourself with the photo below:

Note!
Let's start with the fact that the photo above shows the screws, thanks to which the idle speed is adjusted. As you can see, the screws are deep in the carburetor throttle bodies, so the screw under the number "1" is not visible in the photo. On some vehicles, bushings are pressed onto both of these screws, due to which the screws can only be turned half a turn. If due to these bushings it is not possible to turn the idle speed screw properly, then in this case, unscrew the screws and, as a result, break the heads of the bushings. When the screws are out, brush off the remnants of the broken bushings from them and then screw the screws back into place!

Idle speed adjustment using the Gas analyzer:

1) First, start the car and let it warm up to the operating temperature of “90-95 °C”. After the car warms up, use a screwdriver to start turning the screw indicated in the photo under the number “2”, turn this screw until the crankshaft speed reaches “750-800 min”.

Note!
For you to understand in more detail, when the screw is screwed in, the crankshaft speed will gradually decrease, and with the opposite effect, that is, when it is loosened, the speed will gradually increase!

2) Now smoothly proceed to adjusting the "CO" content in the exhaust gases, to do this, turn the screw which is indicated under the number "1" in the photo above. When turning the screw under the number "1", the content of "CO" in the exhaust gases will gradually decrease, and when unscrewed, it will increase accordingly.

Note!
It is necessary to regulate the content of "CO" in the exhaust gases in accordance with the "GOST" for today. It is not necessary to lower the content of "CO" below the norm, because in connection with this, the content of unburned hydrocarbons "CH" may sharply increase. By the way, when adjusting the screw "1", it can change the crankshaft speed!

3) And finally, turn the screw under the number "2", thereby bringing the crankshaft speed back to normal. After that, it is also recommended using the device to check the content of "CO" in the exhaust gases. If it is necessary to re-adjust both screws, adjust them until the engine operation and CO emission into the atmosphere reach the norm.

Note!
After all adjustments, sit in the car and sharply press and then release the gas pedal. Make sure that pressing the pedal the engine runs without interruption, and when it is released, the engine of the car should not stall. In the event that after releasing the gas pedal, the engine stalls, then increase the crankshaft speed to “800 rpm”. The crankshaft speed is regulated by the screw under the number "2"!

Idle adjustment without Gas analyzer:

1) To begin with, slowly start turning the mixture screw, which is indicated under the number "1". Rotate it until the crankshaft speed is maximum. (The crankshaft speed can be very easily read from the tachometer)

Note!
When this screw is rotated, the exhaust of harmful substances into the atmosphere is regulated. When this screw is screwed in, the amount of "CO" emitted into the atmosphere will decrease, and when unscrewed, on the contrary, it will increase!

2) Then, with the screw under the number "2", set the crankshaft speed to "1100 rpm".

Note!
The screw under the number "2" regulates the speed of the crankshaft, so when this screw is screwed in, the speed will gradually decrease, respectively, when unscrewed, it will gradually increase!

VAZ 2107 not best model among cars of its class, when compared with foreign approximate analogues. Nevertheless, due to the low price and affordable service, the car has been popular throughout the post-Soviet territory for many years. The car was produced from 1982 until 2014. That is, the most old model is over 30 years old. During such a period of operation, the owner will be able to encounter all types of malfunctions and investigate most of the causes of malfunctions.

After several years of operation, the VAZ 2107, as well as the almost identical model 2105, begins to show a new character with changes not for the better. Faults related to power unit and its body kit have different character, but symptomatic

• the engine stalls intermittently;
• does not keep stable speed;
• unstable idling;
• hard to start;
• insufficient power;
• increased fuel consumption.

All malfunctions appear for two reasons: violation of adjustments or wear of parts.

Usually expressed in a spontaneous change in engine speed. It is observed while driving and at idle. The most common cause of revving for VAZ2107/2105 injection units is the failure of the DMRV (mass air flow sensor).

This device controls the amount of air entering the engine. Based on these data, the ECU regulates the supply combustible mixture with the optimal ratio of fuel and air at different engine operating modes. Accordingly, in the absence of this balance, engine speed begins to depend on the amount of oxygen supplied. That is, a breeze blew - the speed increased, the verse - decreased.

Making sure that it is the DMRV that is faulty is quite simple. Disconnect the device connector and the ECU will go to emergency mode work. In this mode, the fuel supply is controlled by the throttle position. If the car began to behave more adequately, then the DMVR is faulty. You can drive like this, but power will drop a little and fuel consumption will increase.

A failed mass air flow sensor cannot be repaired, except for its contamination, so you can try to clean it.

Cleaning algorithm for DMVR VAZ2107/2105:

1. Remove the sensor together with the protective cover.

1. Unscrew the two screws and pull the sensor out of the base without touching the surfaces of the active element (current bent wire).
2. Wash the casing with any dishwashing detergent.
3. Using a can of DMVR or carburetor cleaner, alcohol-based (no acetone), gently clean surfaces.
4. Pour abundantly 3-4 times, the liquid should drain.
5. Dry the device.
6. Assemble the block in reverse order.

If the problem persists, you will have to buy a new device.

Unstable operation of the carburetor engine

The nature of the unstable speed of the VAZ2107/2105 engine with carburetors is the same as that of the injection engine, in the uncontrolled supply of air or fuel to the combustion chamber.

But in this case, the carburetor is responsible for preparing the combustible mixture. This is a completely mechanical device that is responsible for the optimal ratio of fuel to oxygen for different operating modes of the power unit.

Although there are filters at the fuel and air inlets, they may not operate efficiently, usually due to a long service life that exceeds the specified maintenance standards. As a result, small particles clog the carburetor jets.

Drivers with great experience do not stand on ceremony much, they throw the VAZ2107/2105 carburetor into a bucket of gasoline for a day, then they blow it from all sides with compressed air and the carburetor seems to be working normally. This is a normal solution, but flammable. Among the causes of engine malfunctions, which are caused by a breakdown of the carburetor, can be identified:

• displacement of the position of the adjusting screws from shock or vibration;
• increase in the diameter of the hole of the jets due to wear;
• damper axle wear, limiting its travel;
• jet clogging;
• violation of the tightness of the float.

To determine the malfunction of the VAZ2107/2105 carburetor, and it is likely to be complex, start by checking the tightness of the float. To do this, remove it from the top cover of the carburetor (it must be dismantled). If there is gasoline in the float, discard the float; if there is air, check in a bowl of water for bubbles. Let's say he passed the exam, then you need to check the gap.

Raise the carburetor cover vertically. The gap between the float chamber and the carburetor wall should be 6.5 mm.

Install the carburetor cap and run the engine for 30 seconds. Remove the cover. The level of gasoline should exactly coincide with the middle of the conical surface of the carburetor body. If this does not work out, you should slightly bend the angle of the float rod.

Over time, air and fuel jets either become clogged or wear out. In the first case, they must be cleaned and blown. In the second case, the throughput of the jets should be checked using a water tank installed 1 meter above the measured jet. A tube connects them. A measuring flask is installed below. Measurements are made in units of cm3/min. Depending on the jet marking, the volume of liquid collected per minute in a volumetric flask should correspond.

It is much easier after 7-10 years of carburetor operation to buy a set of jets and replace them.

Those who use gas installations should be aware that the carburetor is not used when driving on gas. Over time, oxide forms inside dry jets, which clogs the fuel supply holes. The petrol car may not start. It is recommended to use gasoline periodically.

Carburetor adjustment

Adjusting the carburetor consists of several steps:

1. Adjust the float position as described above.
2. Check and set the "quality" and "quantity" screws to the initial state. Screw them all the way in and unscrew them 2-3 turns for the “quality” screw and 3-4 for the “quantity” screw.
3. Connect a tachometer or autotester to the "K" terminal of the ignition coil, and the second probe to the housing.
4. Start and warm up the engine to 90°C

1. Set the “quality” screw to the maximum idle speed. The supply of gasoline increases when the screw is rotated counterclockwise.
2. Use the “quantity” screw to set the speed more, approximately 80-90 rpm.
3. With the quality screw, we determine whether these revolutions are maximum, if not, then repeat the procedure.
4. If the position of the quantity screw does not affect the engine speed, tighten the quality screw so that the speed drops by 800-900 rpm.

This carburetor adjustment may not be entirely accurate, but does not require special equipment.

If the car stalled

An engine that suddenly stalls is not only a driving inconvenience, but also a safety hazard for the driver and passengers. There are several reasons.

Stalling at idle:

• failure of the idle speed sensor;
• failure of the throttle sensor;
• failure of the throttle position sensor.

Silences on the go:

• interruption of fuel or air supply due to a dirty filter;
• malfunction of the fuel pump;
• clogging of carburetor jets;
• engine overheating.

It is better to start diagnosing a car whose engine stalls in the most unexpected places by checking the idle speed sensor.

It's easy to check if it works. Dismantle the device without removing the contacts, or connect them after dismantling. Hold the device in your hands, put your finger on the cone needle and ask a friend to turn on the ignition. If you feel shocks, then install the device back. The idle speed sensor is OK.

If the throttle sensor fails, the car will not only stall, but will not start either, because the ECU will give the command for maximum fuel ejection, the candles will flood and the engine will stall.

If you are on the road in a VAZ car and there is a problem with the throttle sensor, then it’s easier not to bother and contact the nearest service, but if you reach the garage, you can use the following instructions:

1. Remove the sensor.
2. Using a 2 mm drill, drill around the plastic cover.
3. Take out the plastic pad of the upper contact group.
4. On the bottom platform, clean the tracks with WD-40 or alcohol.
5. Same with contact group top cover, but do not bend them, they will then prematurely eat the tracks.
6. Assemble in reverse order.
7. Coat the contour with any glue for plastic.

Not enough air

Often the car starts up well, rides on the choke, but as soon as the choke is turned off, the engine stalls. It says only one thing - lack of air. Most likely clogged air jets. They need to be unscrewed and cleaned. Then check that the car should not stall without suction.

There are an incredible number of reasons for the poor performance of car units with similar symptoms, but only a specialist with a set of professional diagnostic tools can understand them. But if you feel confident in yourself - go for it, VAZ car services are already waiting for you.

Despite the development of the automotive industry, classic models VAZs are still in great demand in the CIS countries. Latest Models"Classics", namely the VAZ-2107, were equipped with injection system inlet. It is more reliable than carburetor. But what to do if the VAZ-2107 starts up and stalls? The injector is a more complex system. But the problem can be solved by hand. Let's see how to do it.

Does the starter spin?

First you need to check the voltage in the car's on-board network. For a normal start of the machine, this indicator should not be lower than 12.5 V. To accurately measure the voltage, you must use a voltmeter.

A starter is a mechanism that requires a large starting current. It is this knot that turns crankshaft for start. Therefore, if the VAZ-2107 (injector) does not start, the reasons may be commonplace - low battery voltage. The solution is to charge the battery. You should adhere to the indicators in 12.5-14 Volts.

Starter failure

If there is a short in the housing or armature wiring, replace the damaged part. How to check an element? To do this, you need to use a multimeter. One wire is connected to the place of friction of the brushes, and the second - to the axis of the armature. If the arrow of the device deviates from the values, this may be a malfunction of the armature or winding. Check brushes. They should move easily, and their springs should be elastic and put good pressure on the anchor. After replacing damaged elements, start the engine again.

Ignition system

What to do if, with a well-charged battery and a working starter, the VAZ-2107 (injector) does not start? The reasons may be hidden in the ignition system. Here it is non-contact type. The first thing to check is the condition of the spark plugs. They can simply be "filled". Unscrew the elements out and inspect the condition of the electrode. In the presence of plaque, the part should be cleaned in an alkaline solution and screwed back. You should also check the gap between the electrode. To do this, use a special probe. The normal indicator should be in the range from 0.7 to 1 millimeter.

What if the indicator does not correspond to the norm? The electrode can be bent. But do it carefully. If the indicator is less than normal, use a minus screwdriver. If more, tap the electrode on a metal part (such as an engine valve cover). It would be useful to check the candles for spark generation. For this, a special gun is used. The spark itself should be blue. If the parts have traveled more than 60 thousand kilometers, they should be replaced. Also, when this period is reached, the ones going to them from the ignition distributor change.

When the candles are lit

If the VAZ-2107 injector does not start well (grabs but does not start), then the combustion chamber is overflowing with gasoline. The normal ratio of fuel to air should be 1:14. This problem often happens on these vehicles. When starting, the fuel pump pumps a lot of gasoline. By the way, on injection motors it is electric, submersible type. Installed directly into the tank.

How to dry candles without removing them? To do this, at startup, open throttle valve. It is mechanical here and is activated by pressing the accelerator trigger through the cable drive. This will allow more air into the combustion chamber and the engine will start immediately.

distributor

The VAZ-2107 car uses distributor ignition. If you need to check the condition of the contacts on the high-voltage wires. When the season changes, condensation forms on them. The distributor has five outputs.

Four of them go to the cylinder plugs, and one (central) goes to the ignition coil. A white coating often forms on the metal ends. Because of it, the slider will not be able to transmit impulses to the coil. By the way, it would be useful to check the ignition distributor itself. The detail looks like this:

If it is burnt, the part should be replaced. The price of a new element is 150 rubles. If a spark forms on the ignition coil when starting the engine, replace high voltage wire. He also "punches" on candles. You can see it at night time. Small blue sparks are visible near them. In this case, the wires are changed as a set. They are inexpensive. New elements cost about 700 rubles.

Electric pump problem

Previously, one of the main problems on the domestic "Classic" concerned the fuel pump, which constantly overheated. But in the injector "seven" it is electric and is cooled by the gasoline itself, which is in the tank. If the element is not supplied with electricity, the car simply will not start. The first thing you should pay attention to is the fuse box.

On the cover it is written which one is responsible for the fuel pump. If the fuse is blown, replace it. A 15 or 20 amp cell can be used.

We determine the serviceability visually

Is it possible to check if voltage is applied to the fuel pump without a multimeter? To do this, when you turn on the ignition, you should carefully listen to its work. When you turn the key to the third position, it should make a characteristic hum. It can be heard in the rear of the cabin. If it is not there and the VAZ-2107 (injector) does not start, the problem is in the voltage supply. It is worth checking the pump relay. It should make characteristic clicks. Experienced motorists carry spare relays and fuses with them in case of sudden breakdowns. This relay is located on a shelf under the glove compartment.

Low pressure

Why does the VAZ-2107 (injector) not start? Problems may be hiding in low blood pressure fuel line. For a normal start injection engine at least 2.8 atmospheres is required. You can check this by disconnecting the supply tube from the ramp. Use a manometer for this. Malfunctions with the pump may occur due to frequent overheating. But how does this happen if it is a submersible type? Fuel pump riding on an empty tank kills. If the light comes on, do not tighten with refueling. The cost of the pump for the injection "seven" is 3 times higher than for the carburetor.

Filter Status

The following situation also occurs. You arrived at your destination, turned off the engine for two minutes, got into the car and could not start it again. What to do if the VAZ-2107 (injector) This may be due to a clogged fuel filter. Its replacement period is about 50 thousand kilometers. A dirty air filter is also the cause of a difficult start.

If it has traveled more than ten thousand kilometers, then it must be replaced. Otherwise, you will run into startup problems.

VAZ-2107: the injector starts and immediately stalls

In this case, check the mass air flow sensor. It is located immediately behind the plastic filter housing.

This element receives information about the air flow and transmits it to the control unit. As a result, the electronics decide on the composition of the combustible mixture. The unit can deliberately adjust the concentration of fuel and air. The resource of the DMRV sensor is 150 thousand kilometers. When contaminated, the element may send false readings. Because of the VAZ-2107, the injector does not start or works and immediately stalls. You should also check the condition of the air pipes for tightness. If necessary, replace.

DPKV

If, with a working fuel system, the VAZ-2107 car (injector) does not start, If it is faulty, the control unit will stop supplying fuel due to lack of information about its position. The cost of this element ranges from one to one and a half thousand rubles.

Conclusion

So, we found out for what reasons the VAZ-2107 car does not start. As you can see, you can detect and fix a malfunction with your own hands, and for a small price.