Why VAZ 2114 won't start

If the VAZ 2114 does not start, then you should not be very upset. This car is quite simple, most problems are easily fixed within an hour. The article discusses the main diseases, breakdowns, as well as ways to eliminate them.

VAZ 2114 won't start - no spark

The VAZ 2114 operating system is a typical injection engine. According to the crankshaft position sensor, the control unit determines the position of the pistons in the cylinders, after which it supplies a spark or gasoline to them. So, the usual eight-valve engine 21124 has a typical malfunction. The fact is that the crankshaft position sensor chip tends to rot. A new chip in the store costs 15 rubles, it takes 15 minutes to replace it. In most cases, this solves all problems.

Now consider more complex cases when the VAZ 2114 does not start. First, you need to make sure that power is supplied to the ignition module. To do this, remove the chip from it, after which we measure the voltage at the central terminal and the mass of the car. With the ignition on, there should be 12 volts here. If 12 volts is not here, we dig towards the malfunction of the control unit. This is the most difficult case of diagnosis, so we will not consider it.

We made sure that 12 volts is supplied to the ignition module along the positive line, you need to know for sure that the ignition module itself is working. It must be said right away that the diagnosis of the ignition module is usually relative. It allows you to check the integrity of the coil, resistance. However, it does not allow measuring the inductance, as well as the breakdown voltage at the moment of ignition. In addition, this position does not allow you to check the energy storage time of the coil. Therefore, we take a regular cartoon, we check the resistance between the second and third terminals of the coil.

The resistance here should be about 1.2 kOhm, if it is less than 1 kOhm, the coil should be replaced. This indicates that the primary ignition circuit is in a short circuit. After that, we check the secondary coils of the ignition module. To do this, we measure the resistance between the first and fourth, second and third output for high-voltage wires. Here, the coil resistance of each manufacturer may differ, so it is best to look at the relative resistance, that is, it should be approximately the same.

If there are no more reasons, we check the high-voltage wires for resistance. Wire resistance for cylinder 4 should be no more than 5 kΩ. The resistance for the armored wire of the first cylinder should not exceed 10 kOhm. The last item worth checking out is this candle. In general, in this case it is easier to screw in new ones, since not every city has a stand for checking spark plugs.

The best spark plugs for a conventional 8 valve VAZ engine are a17dvrm.

VAZ 2114 does not start dry candles

If the VAZ 2114 does not start, first of all we unscrew the candles. The fact that they are dry indicates that no fuel is being supplied to the cylinders. If there is a spark, then we immediately discard the crankshaft position sensor, because the control unit definitely understands the position of the cylinders at the time, since it supplies a spark to the candles.

First, turn on the ignition and listen to see if the fuel pump is working. If the fuel pump is not working, then the first thing to do is check its fuse. In addition, you should pay attention to whether the fuel pump relay clicks after the ignition is turned on. If this is not the case, then the matter is most likely in the ignition switch, or the relay itself is faulty. If the relay clicks, this indicates that the fuel pump activation circuit is closing. Then you need to check the voltage on the relay, after which we remove the back seat, remove the chip from the fuel pump, turn on the ignition and measure the voltage on the chip. In general, the fuel pump circuit runs through the cabin, so something rarely happens to it. From this we conclude that the fuel pump, most likely, just burned out. After the replacement, everything will fall into place.

If the VAZ 2114 does not start, the fuel pump is running, the starter is turning, then you need to pay attention to whether there is fuel in the fuel rail. There is a special spool for this, which is closed with a black cap. After turning on the ignition, you need to press this spool, fuel should hit from the ramp. If this does not happen, then we check either the fuel pressure regulator by pinching the return line into the fuel tank, or we change the fuel filter. Ideally, a pressure gauge should be screwed onto this spool, which will show the pressure in the fuel rail. It should be 3.2 atmospheres after the ignition is turned on. If you pinch the return line, then the pressure should be at least 6 atmospheres.

When we are convinced that there is pressure in the fuel rail, we need to make sure that the nozzles open. To do this, remove the chip from any injector, and then add the voltage on the red-pink wire with the ignition on. This is a general plus. It's permanent on the injectors. If 12 volts is not observed on this line, then we go to look in the control unit.

VAZ 2114 does not start starter does not turn

VAZ 2114 does not start, the starter does not turn, then the first thing you need to pay attention to is that the retractor relay clicks. If it clicks, remove the starter, disassemble the retractor relay, and then protect the patches-contacts.
If the starter does not turn, no clicks are observed, then you need to listen to whether the starter enable relay clicks. If it does not click, then just change it, the problem goes away. If the relay clicks, but the starter does not click, then you need to change the solenoid relay.

Conclusion

In conclusion, it is worth clarifying that far from all the reasons why the VAZ 2114 may not start. Unfortunately, the quality of parts recently, not only for domestic cars, has gone for the worse, so you can expect anything. For example, there are times when a new nozzle fails immediately after installation. There are times when a new gas pump immediately after installation cannot pump pressure above 2 atmospheres. Therefore, when diagnosing malfunctions, it is worth considering any option, despite the previous repair operation.

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