The auto giant VAZ presented domestic car enthusiasts with many vehicle models that have become classics today. They are still incredibly popular. Sometimes a car's systems malfunction. The car cannot move.
There are many reasons for this trouble. In each specific case there are reasons why the VAZ-2107 does not start. To solve this problem, it is necessary to consider the most common breakdowns of this model. Experienced auto mechanics are ready to share their experience with “Seven” owners.
Solving the problem yourself
There are quite a few reasons why the VAZ-2107 starts and stalls or does not move at all. You can easily find the problem yourself. But for this you need to be patient, the necessary tools and enough free time. If trouble catches the owner of a car when he is in a hurry about his business, it is better to take another car. It will be possible to repair this later, when there is enough time to carry out diagnostics.
It does not matter whether the carburetor or injection engine is installed on this model. Diagnostics is carried out in any case according to a single scheme.
First of all, you need to pay attention to the battery, whether it is charged. Also, the battery may fail for some reason. Next, the spark plugs and fuel filters are inspected. You can also check the throttle valve. There may be a blockage in it. This is the simplest test, which sometimes immediately reveals a malfunction. If the cause cannot be determined, a more in-depth diagnosis will be required.
VAZ 2107 injector does not start
With an injection engine, everything is a little simpler and more complicated at the same time. In principle, there are again two directions: gasoline and spark. Well, compression, respectively. For starters, there is a “check engine” light that will light up if the ignition system is faulty. The error code in this case will begin with P03XX. That is, misfires in the cylinders. Of course, you must first check if there is a spark. There are several diagnostic methods that are worth paying attention to:
Ignition system failures
The starter may turn briskly, but the engine will not start. The VAZ-2107 (carburetor or injector) most likely cannot move due to the fuel supply system or its ignition. It is better to start with the latter when diagnosing. This system in the presented model fails more often. This is especially true in wet weather.
The contact system of the “seven” can be very different. There are cars with the simplest device (classic) or with a very complex electronic contactless principle. There are also combined options.
In any case, the ignition system will consist of 4 parts. This is a low-voltage group, step-up transformer (coil). Next comes the high-voltage part and spark plugs. The check is carried out step by step (and better from the end).
VAZ 2107 carburetor does not start - reasons
The first step is to determine whether fuel is entering the engine. To do this, check the entire fuel system.
Fuel tank and fuel lines of the VAZ 2107: 1 - fuel pump; 2 — hose from the fuel pump to the carburetor; 3 - carburetor; 4 — rear tube; 5 — sensor for level indicator and fuel reserve; 6 — safety shield; 7 — tank ventilation tube; 8 — fuel tank; 9 — gaskets; 10 — fuel tank mounting clamp; 11 — front tube; 12 — fine fuel filter.
Above are only the most basic reasons why fuel does not enter the manifold. It should also be remembered that each case is unique and there is simply no universal method for solving all problems.
In another case, when gasoline enters the engine, the spark plugs are simply filled with fuel. A step-by-step check of the ignition system should be carried out. It is most convenient to do the work with a partner.
High voltage part of the system
If the VAZ-2107 starts poorly or does not work at all, you need to check the center wire. It connects the distributor to the coil. To do this, the tip of the wire is carefully removed from the cover. Next, it is brought closer to any part that is in close contact with the mass of the machine. It does not matter whether this surface is painted or not.
Next, you need to secure the wire in such a way that there is a small space between the selected part and its tip (5-7 mm is enough). If the car has an electronic ignition, the conductor must be secured especially carefully. After all, if it falls on ground, all electronics will most likely fail.
You should also not scratch the central wire across the body. Do not hold the conductor with your hand. The electric shock will be quite strong. If there is a spark in this system, then the problem is in another system.
What could be the reason?
When a VAZ 2107 car starts too poorly (that is, not the first time) or does not start at all, this greatly limits your capabilities. Having your own personal car, you cannot go anywhere, because even if the engine starts, there is no guarantee that it will not fail at the first stop. That is why it is so important to always change consumables during all technical inspections. Let's look at possible faults.
- First of all, check the condition of the battery. There should be no rust or any traces of drips on it;
- carefully inspect the fuses. A power surge could cause them to melt;
- there could be problems with the ignition switch;
- if there is corrosion on the parts, then this may also be the cause of problems with the car;
- The ignition coil may have failed and is therefore not producing a spark. Replacing the coil will clear things up;
- failure of the fuel system;
- large accumulation of condensate under the hood.
Further exploration of electronics
In search of the reason why the VAZ-2107 does not start, it is necessary to further examine the electronics. If the issue is not the center wire ignition spark, you will need to remove the distributor cap. It is necessary to visually assess its internal state.
If dirt or condensation has accumulated under the distribution cover, the spark may not go where it should. To eliminate such violations, this space should be washed, dried and cleaned. The distributor contacts are also cleaned with fine sandpaper. If there is a dark mark on the slider or cover from an electrical shock, the part will need to be replaced.
Next, you should very carefully examine the wires going to the spark plugs. Their tips and all communications must be clean and dry. After this, the cover can be installed in its original place. The system is checked again. If all is unsuccessful, turn the candles out and clean them. Sometimes they will need to be replaced altogether.
What you shouldn't forget
Of course, the most common reason is the usual breakdown of the starter on a VAZ 2107. There is nothing terrible or special about this. This often happens even on modern foreign cars. Dismantle this part and examine it to ensure its integrity. Thoroughly clean off accumulated deposits and apply new lubricant. It was the accumulated dirt and lack of lubrication that could prevent it from starting.
It is also impossible not to take into account the possible overheating of the engine, which has a very bad effect on it. This can happen not only in the hot season, but also on a cold winter day. The cooling system could have leaked, which can be seen by traces of coolant (antifreeze) in the cabin. If you do not find them, we recommend disassembling the “stove” and carefully inspecting all pipes for leaks.
Oddly enough, due to ordinary dirt, your radiator could become clogged, which is why its cooling was impaired. Be sure to clean it thoroughly. Now move on to inspect the detail, which, for some unknown reason, is usually not given much importance. This spare part is the inlet valve.
He could easily burn out and thereby stop performing his functions. Thus, the exhaust gases will have a high temperature and overheat the car, which is bad for it.
Checking the voltage on the ignition coil
If after the above manipulations the VAZ-2107 does not start, you need to check the ignition coil. Voltage may or may not be applied to it. In the first case, it is the coil that causes the problem. This happens rarely, but in this case it will be necessary to change it. Sometimes the wires are poorly attached to it, which leads to malfunction.
If there is no voltage on the coil, the reason is most likely the electronics, in which the contacts and connections in the low-voltage part are not securely attached. But you can’t handle diagnostics in this system on your own. You will have to contact a professional mechanic.
If the car's ignition system is of the classic contact type, you can also try to inspect the breaker contacts. If the car has been left idle for some time, they may oxidize. In this case, they are cleared. If voltage is supplied to the coil, you can continue to operate the car. If not, you need to contact the service center.
No fuel supply
When problems arise with the fuel supply on a VAZ 2107, regardless of the engine type, it simply will not be possible to start the power unit. You will need to understand the reasons and fix the problem.
On the injector
On an injection engine, the fuel pump located in the tank may break down. We check its performance and, based on the results obtained, perform certain actions: repair or carry out further diagnostics. Checking the fuel pump on the injection “seven” is quite simple: just turn on the ignition and listen to the operation of the mechanism. If there are no signs of the node functioning, it is worth understanding the lack of performance in more detail.
On the carburetor
With a fuel pump on a carburetor engine, things are somewhat more complicated: the mechanism will have to be dismantled, disassembled and the condition of its structural elements diagnosed. Malfunction of the pump leads to the fact that fuel does not flow into the carburetor float chamber or does not flow in sufficient quantities. You can try to pump up gasoline manually, and also check the fuel pump:
If the fuel volume is less than 1 liter, the fuel pump is considered faulty.
Fuel supply
If the VAZ-2107 car does not start even after all the above mentioned manipulations, the problem may be in the fuel supply system. With an injection fuel supply system, you won’t be able to do anything yourself. It can only cause harm. In this case, visiting the service cannot be avoided.
The carburetor system is simpler. Therefore, you can diagnose it yourself. First, check whether gasoline is entering the carburetor. After disconnecting the hose, turn on the manual fuel supply. If everything works, you can check whether fuel is flowing directly into the carburetor.
To do this, remove the air filter and press the accelerator pedal sharply. You can pull the throttle cable instead. You need to look into the carburetor from above (the air damper is open). If there is no stream of gasoline in the first diffuser, it means that the valve needle is stuck or the fuel filter is clogged.
Filter status
The following situation also happens. You arrived at your destination, turned off the engine for two minutes, got into the car and were unable to start it again. What to do if the VAZ-2107 (injector) does not start when hot? This could be due to a clogged fuel filter. Its replacement period is about 50 thousand kilometers. A dirty air filter is also to blame for difficult starting.
If it has traveled more than ten thousand kilometers, it must be replaced. Otherwise, you will encounter startup problems.
Effect of temperature
Often the VAZ-2107 does not start in winter. This problem can be caused by the wrong choice of oil viscosity or its thickening in the gearbox. It becomes difficult for the starter to turn it in the system.
If the oil viscosity is not suitable, it may cause engine failure. Therefore, in cold weather you should be very careful when selecting lubricants. In winter, in order for the car to start quickly, you need to squeeze the clutch all the way. The mechanism will spin the gearbox shafts, preparing the car for movement.
It is in winter that compression problems are detected in the cylinders. It is necessary to remove the candles. Then a little oil is poured into the cylinders. Now you should try to start the car again. Next, the candles are returned to their place. Experienced car enthusiasts claim that this method almost always works.
Checking the electrical equipment of the VAZ 2110
If there is something to burn in the working cylinders, then you need to look for what will make the mixture burn
This means that you need to pay attention to the car's ignition system. This could be the ignition distributor, high-voltage coil and wires, spark plugs
It doesn’t happen that all devices fail at the same time, so we should talk about them separately. We will assume that the distributor is installed correctly; in this case, a failure may occur through a breakdown of the cover or slider, or a failure of the Hall sensor.
However, most often the cause is poor contact in the power connector of the ignition distributor. An ignition module or coils that do not produce high voltage to produce a spark at the spark plugs can create problems. Injectors work in conjunction with ignition modules, of which there are usually two per engine. One ensures the operation of cylinders 1 and 4, and the second - cylinders 2 and 3.
In these systems, the electronic control unit, which generates control pulses for all systems, including the ignition, may be problematic. This block can only be checked by replacing it. The same can be done with ignition modules.
Electrical diagram of VAZ 2110
Sometimes the malfunction may come from the high-voltage coil; it does not produce voltage that can form a spark to ignite the air-fuel mixture. You can check its operation if you unscrew the spark plug from the cylinder and, together with the high-voltage wire, ensure its contact with the engine ground. At this time, you need to crank the starter and watch the spark plug. The absence of a spark confirms that the ignition coil is faulty. It is impossible not to dwell on such elements of ignition systems as spark plugs.
They are the ones who ignite the combustible mixture in the working cylinders of the engine. During their operation, the metal parts of their electrodes burn out, after which the gap increases, starting the motor becomes more difficult, or even becomes impossible. Check the condition of the spark plugs regularly, especially their gap, then problems can be avoided. You can continue to review situations when the starter turns, but the VAZ 2110, 2112, 2114 does not start.
It is simply impossible to take into account absolutely all cases, but to avoid such situations, carry out routine maintenance of the machine in a timely manner, use only high-quality operating fluids.
Electrics in the cold
The VAZ-2107 does not start in cold weather due to problems in the electrical system. Low temperatures reduce spark strength. Therefore, it is necessary to carefully monitor whether the wires are moving away from the coil, and whether the connectors have any signs of oxidation.
You should also remember that cheap spare parts and infrequent maintenance significantly reduce the life of the car. Low-quality antifreeze may be the answer to the question of why the “Seven” does not start. Therefore, by regularly carrying out maintenance and choosing suitable consumables, you can not be afraid of problems with your car. If difficulties arise, they can be resolved quickly and easily.
The VAZ 2107 engine does not pick up speed and does not pull
It happens that the VAZ engine does not pull. This is most often due to low pressure in the rail. The engine starts normally, also idles stable, but does not pick up speed. The thing is that in such modes the fuel pump requires increased performance, which it cannot provide.
If the VAZ engine does not run hot, then it is worth checking the air flow meter, as well as the spark plugs. The article already mentioned a red spark, but when cold, they can be normal, but under the influence of temperature they become “broken.”
Source
Electric pump problem
Previously, one of the main problems on the domestic “Classic” concerned the fuel pump, which constantly overheated. But in the injection “seven” it is electric and is cooled by the gasoline itself that is in the tank. If there is no electricity supplied to the element, the car simply will not start. The first thing you should pay attention to is the fuse box.
It is written on the cover which one is responsible for the fuel pump. If the fuse is blown, replace it. A 15 or 20 amp element can be used.
Possible reasons for different types of motors
The breakdown may be specific to a particular engine:
Diesel
The most common reason for the inability to start a diesel power unit is incorrect operation or breakdown of glow plugs. Determining it is quite simple; to do this, you need to take pieces of thick cables and a battery and connect them to a power source. If the spark plug does not turn red from heat, it definitely needs to be replaced.
The engine may also not start due to air mixture entering the high-pressure fuel pump. If the car's engine operates with this system, which pumps diesel, then you need to turn on the ignition, then the silencing valve will move to the open position. Then you will need to pump the fuel until diesel comes out of the injector check valve instead of air. If the machine does not have a manual pumping drive, then the low-pressure pump is electrically driven.
In this case, it is recommended to activate the ignition for a few minutes.
Carburetor
It is recommended to start by checking the engine ignition system. This is done with a certain sequence of steps:
- to begin with, disconnect the central cable and bring it 5 mm closer to a metal object;
- After this, the starter turns.
If there is no spark, then the problem lies with the ignition coil. When it is present, you need to try to get sparks to form separately on each spark plug. To do this, you should, in turn, disconnect the cable that goes to one coil and stretch it to the metal part of the car.
The operation of the gasoline pump should be checked by removing the air filter cover and pulling the accelerator rod. When fuel enters the float chamber at the moment when the throttle valve is fully open, the pump operates normally. If gasoline does not flow, then you should:
- check if the carburetor sump mesh is dirty;
- functioning of the fuel filter.
Injector
In the case of an injection power unit, when you turn the key in the ignition switch, a quiet sound should be heard, similar to a buzzing under the rear seat. If you cannot hear it, then the fuel pump is not functioning. In this case, it should be replaced.
Starting problems may also occur if there is no fuel pressure in the rail. To check this, you need to press the valve, which is located under the cap. If the fuel supply has not started, then you should check the following elements:
- intake mesh;
- pressure reducing valve;
- fuel filter.
If the owner has attempted to start the engine in the cold, the spark plugs may become flooded with gasoline. In this case, they can be dried; to do this, you need to disconnect the high-voltage cables and crank the starter for a certain time.
