Do not start VAZ-2115: possible causes and their elimination

With the onset of cold weather, sometimes the machine refuses to start. This problem is often faced by owners of domestic cars. The VAZ-2115 is not an exception. Breakdowns can be different. But in most cases they are easily eliminated by themselves. Let's consider why the car VAZ-2115 does not start, the causes of this phenomenon and methods of troubleshooting.

Fuel system

If the window is below -20 degrees, it is possible that condensation has formed in the tank. The presence of water in gasoline is a bad sign. And it is not necessary that it is "diluted" at the gas stations themselves. Due to the difference in temperature, a condensation forms on the walls of the tank. At low temperatures it freezes. As a result, the VAZ-2115 (injector, 8 valves) is not started. Frozen water can be both in fuel lines, and in the filter itself. Trying to twist the starter with the hope that the car is about to start, it's not worth it. You just plant the battery. The only solution is to warm the car. It is better if he is in a garage with such a problem. Installing there oil or induction heater, you will quickly heat the air temperature in the room. And the machine will be successfully started.

Clogged filters

This problem can occur both in summer and in winter. And it concerns not only the fuel, but also the air filter. The latter is in a special plastic case. On cars VAZ of 15th model it looks as follows.

After pushing the latches, lift the cover of the air filter housing and take out the cleaning element itself. If it is dirty, replace the part. Filters are consumables, and you will not be able to restore them at home. Moreover, they cost a penny. As for the fuel filter, it is located under the bottom of the car. Looks like the element on the photo below.

If the car traveled over 30 thousand kilometers, the filter should be replaced. Visually determine the degree of its pollution, as in the air, you will not succeed. The part is in a closed, non-separable casing. Inside it there is a porous paper. It is capable of passing particles smaller than 10 microns. Over time, the pores of paper are clogged, and the filter is not able to pass through itself the amount of fuel needed. To prevent the problem from catching you unaware, change this part in advance.

A characteristic sign of failure is jerking during the movement (as if for a while the supply of fuel to the cylinders stopped). This means that the submersible pump is not able to supply the right amount of fuel through the paper pores. As for the air filter, it changes every 6 months or once every 10 thousand kilometers. Observing the regulations, you will protect yourself from such problems.

Candles

If they do not produce sparks, even with the new filters there will be a situation where the VAZ-2115 will not start. It is necessary to unscrew the elements with the help of a polyhedral key and inspect their condition. Often, they are "flooded", because of what does not start VAZ-2115. This means that the working part of the candles is covered with a lot of fuel. As a result, the spark is not able to ignite the fuel.

And, as you know, not only gasoline but also air is supplied to the chamber. If there is not enough of the latter, starting the motor will be difficult.

How to solve a problem?

You can solve this problem in two ways:

• On the spot. If there is no time to unscrew the candles, you can try to dry them right in the engine. To do this, open the throttle by 50% before starting. The benefit of the VAZ-2115 accelerator pedal is mechanical, with a cable drive. So more air gets into the combustion chamber. Candles are "blown out" automatically. After starting the throttle can be closed. But this method is not always effective. And then the second method comes to the rescue.
• Self-drying. In this case all four candles are twisted. The important point - when removing the armor bridges, number each of them. Otherwise, the engine will not start at all, as the phases of the gas distribution will be violated. Dry quickly can be a home hair dryer, setting it to the maximum blowing mode. If time allows, you can check the gaps between the electrodes of the candles. When this parameter does not coincide with the factory one, the candle can not produce a normal spark. We speak about this in more detail.

About the glow of candles

Over time, the gap between the electrodes increases. The normal parameter is between 0.7 mm and one millimeter. Check this gap by using a special probe.

The same applies to the installation of valve gaps on carburetor motors. So, if the parameter does not correspond to the norm, it should be corrected. To do this, use a negative screwdriver. To reduce the gap, push it to the top electrode of the spark plug. With the second hand, hold the part itself. If they are "overdone", it does not matter - everything can be returned back. To do this, bend the electrode with the edge of the screwdriver (it bends fairly easily) and again check the distance. It is worth noting that with a correctly exposed gap, you can not only ensure trouble-free start of the engine, but also reduce fuel consumption by 5 percent. Also the car will work smoothly. After all, the mixture is ignited at the very moment when it is necessary. Well, the last is the resource of the candles themselves. If the gap is higher or lower than normal, the risk of penetrating the insulator is increased at times. As for the regulations for the replacement, it is about 40 thousand kilometers. Together with the candles, it is recommended to replace the high-voltage wires.

Coil

Modern cars are no longer equipped with trailers. Here is the ignition module. VAZ-2115 (16 valves) is no exception. Sometimes there are breakdowns. Because of this VAZ-2115 will not start. Causes in the faulty ignition distributor.

This item can not be repaired. And in order not to waste time on diagnostics (or if you do not have a multimeter), it is necessary to install a known good ignition module. VAZ-2115 should be unchecked. Sometimes the high voltage wires themselves pierce themselves. But in this case the car starts and throws. This can be heard from the characteristic sound of the engine.

Relays and fuses VAZ-2115

It happens that the machine does not start because of a banal failure of the fuses. In this case, the pump will not emit a characteristic buzz when the ignition is switched on. Sound should be heard from under the rear seats. On vehicles VAZ-2115 the pump is submersible, and it is placed directly in the fuel tank. If there is no hum in the first 3-5 seconds after the ignition is switched on, it means that the element is not powered.

We begin to search for a break in the fuses. The cover indicates which one is responsible for the electric gasoline pump. But not only fuses are tested. VAZ-2115 is also equipped with a relay. This element should produce characteristic clicks when the ignition is switched on. If VAZ-2115 is not started and no clicks are heard, the pump relay is likely to be replaced. Sometimes the cleaning of contacts saves. To do this, use special sprays in spray cans. For the future, it is worth buying a set of spare relays and fuses. Sometimes such a "child" breakdown happens on the way. продолжить движение. With new parts in stock, you can continue to move smoothly .

Conclusion

So, we found out why the VAZ-2115 does not start. As you can see, all the malfunctions can be eliminated by hand.