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Why does the VAZ-2107 not start? Automotive mechanics tips

The auto giant VAZ has presented domestic motorists with many models of vehicles, which today have become classics. They are still very popular. It happens, in the systems of the car there is a failure. The machine can not move.

The reasons for this trouble are many. In each 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 the owners of the "Seven".

Independent solution of the problem

The reasons why the VAZ-2107 gets stuck and stalls or does not move at all is quite a lot. You can find the breakdown yourself. But for this you need to be patient, with the necessary tools and plenty of free time. If trouble has caught the owner of the car, when he rushes about his business, it is better to take another car. This repair will be possible later, when there will be enough time for the diagnosis.

It does not matter whether the carburetor or the injector engine is installed on this model. Diagnosis is made in any case according to a single scheme.

First of all, you must pay attention to the battery, it is charged. Also, the battery may be out of order for some reason. Next, candles and fuel filters are inspected. You can also check the throttle. It can be clogged. This is the simplest test, which sometimes immediately reveals a malfunction. If the cause could not be established, a deeper diagnosis would be required.

The first step of the diagnosis

What should I check first, if VAZ-2107 does not start? A starter - that's what requires a lot of attention. You should see how it behaves when the ignition. He can work vigorously, weakly or not at all to react to the ignition.

If the starter does not work at all, the failure can be associated with this node. But this picture is typical for a fully discharged battery. The starter relay does not even click. To check this version, you need to turn on any battery-powered equipment, such as headlights.

If the starter turns slightly, the problem is a discharged battery. This can be confirmed by the dim lights of the headlights.

The battery failure at best can be solved by tightening the terminals. If the battery is completely discharged, you can leave with a push, a tug or a slide. But the machine with electronic fuel injection or automatic transmission in such a way to set in motion will not succeed.

Ignition system failure

The starter can twist cheerfully, but the engine does not start. VAZ-2107 (carburetor or injector), most likely, can not move out of place because of the fuel supply system or its ignition. It is better to start with the last diagnosis. This system in the presented model breaks down more often. This is especially typical for raw weather.

Contact system of the "seven" can be very different. There are cars with the simplest device (classical) or with a very complex electronic contactless principle. There are also combined variants.

In any case, the ignition system will consist of 4 parts. This is a low-voltage group that boosts the transformer (coil). Then follows the high-voltage part and the candles. Verification is carried out in stages (and better from the end).

High-voltage part of the system

If the VAZ-2107 is badly wound up or does not work at all, it is necessary to check the center wire. It connects the distributor to the coil. To do this, the wire tip is carefully removed from the cover. Further it is brought closer to any detail that is in close contact with the mass of the machine. It does not matter whether this surface is painted or not.

Then it is necessary to fix the wire in such a way that a small space remains between the selected part and its tip (5-7 mm is enough). If an electronic type of ignition is used in the car, it is necessary to mount the conductor very carefully. Indeed, when it falls on the mass of all electronics with a high probability of failure.

You can not also twist the central wire around 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.

Further study of electronics

In search of a reason why the VAZ-2107 does not start, it is necessary to further explore the electronics. If it's not a spark of the central wire ignition, you need to remove the distributor cap. It is necessary to visually assess its internal state.

If dirt or condensation accumulates under the distribution cover, the spark may not go where it should be. To eliminate such violations, this space should be washed, dried and cleaned. The distributor contacts are also sanded with fine sandpaper. If the slider or lid has a dark trail from an electric shock, this part will have to be replaced.

Next, very carefully, you should look at the wires leading to the candles. Their tips and all communications must be clean, dry. After that, the cover can be replaced. The system is checked again. If all is in vain, the candles are turned and cleaned. Sometimes they need to be replaced at all.

Checking the voltage on the ignition coil

If after the carried out manipulations VAZ-2107 does not start, it is necessary to check the ignition coil. The voltage can be applied to it or not. In the first case, the cause of the malfunction is the coil. This happens rarely, but in this case it is necessary to change it. Sometimes the wires are not attached to it, which leads to a malfunction.

If there is no voltage on the coil, the reason is most probably the electronics, in which the contacts and connections in the low-voltage part are fixed unreliable. But with diagnostics in this system alone can not cope. I'll have to turn to the professional mechanic.

If the ignition system of the car is of the classic contact type, you can try to inspect the breaker contacts. If the machine has stood still for a while, they can oxidize. In such a case, they are cleaned. If the voltage is applied to the coil, it is possible to operate the car further. If not, you need to contact the service center.

Fuel supply

If the VAZ-2107 is not started, even after all the above manipulations, the problem may be in the fuel supply system. With the fuel injection system, nothing will be done by yourself. You can only hurt. In this case, visits to the service can not be avoided.

Carburettor system is easier. Therefore, it can be diagnosed independently. First, check to see if petrol enters the carburetor. After disconnecting the hose, you must turn on the manual fuel supply. If everything works, you can check whether the fuel is delivered directly to the carburetor.

To do this, the air filter is removed, the accelerator pedal is pressed sharply. Instead of this, you can pull the throttle flap over the cable. The carburetor must be viewed from above (the air damper is open). If there is no trickle of gasoline in the first diffuser, then the valve needle or the fuel filter is clogged.

Effect of temperature

Often the VAZ-2107 does not start in winter. This trouble can be caused by incorrect choice of the viscosity of the oil or its thickening in the gearbox. It becomes difficult for the starter to turn it in the system.

If the viscosity of the oil is not suitable, this could damage the engine. Therefore, in the cold should be treated with the selection of lubricants very carefully. In winter, so that the car quickly wound up, it is necessary to squeeze the clutch to the end. The mechanism will twist the shafts of the gearbox, preparing the machine for movement.

It is in winter in the cylinder that problems with compression are identified. It is necessary to remove the candles. Then a little oil is poured into the cylinders. Now again, try to start the car. Then the candles are returned to the place. Car enthusiasts with experience argue that this method works almost always.

Electrics in frost

VAZ-2107 does not start in the frost even because of problems in the electrical system. Low temperatures reduce the strength of the spark. Therefore, it is necessary to carefully monitor whether the wires from the coil do not depart, and the connectors do not show signs of oxidation.

Also it should be remembered that cheap spare parts, rare maintenance significantly reduce the life of the car. Low-quality antifreeze can be the answer to the question of why the "Seven" is not starting. Therefore, regularly performing maintenance, choosing suitable consumables, you can not be afraid of problems with the car. If difficulties arise, they can be eliminated quickly and easily.

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