I must say, the reasons why the VAZ does not start: 2107, 2106, the model is not so important, not so many. Let's consider in the article the main reasons why the engine does not start.
In general, this problem has two directions: no gasoline and no spark. That is, fuel must enter the cylinder and it must ignite. This is a simple truth from which to start. In addition, there are two more areas - an injection and a carburetor engine. We will focus on them.
VAZ 2107 carburetor does not start
- Checking the fuel pump. For this, it is desirable to have a fine fuel filter, which is installed under the hood. And with the quality of our gasoline, there is simply no way without it. So, if you manually shake the pump, then gasoline should circulate in the filter. If the filter is dry, then it is worth looking for the cause in the air leak in the fuel line. This is rare, but it still happens.
- If the VAZ 2107 engine does not start, and the fuel line is intact, it is necessary to check the fuel pump itself. To check, remove the inlet pipe, to begin with. Fuel must not flow out of the pump. If this happens, then the check valve is faulty, the pump needs to be replaced. If the fuel holds, you need to plug the inlet pipe with your finger, and then pump the pump 5-6 times. After doing such actions, a vacuum should be created in the pump. It shouldn't reset even after a minute.
- When the fuel pump is in good working order and the fuel reaches the carburetor, it is worth doing the following. We remove the air filter cover, after which we ask the assistant to look into the intake manifold. Next, turn the starter and press the gas pedal. When doing this, fuel must be poured into the manifold. If not, then the carburetor needs to be flushed.
You should definitely understand that these are not all possible reasons why gasoline does not enter the cylinders. Each case of malfunction is purely individual, so there is simply no solution to the problem for all occasions.
Now let's see why the carburetor-type VAZ engine does not start, if everything is in order with the fuel system, and the candles are "flooded". In this case, you need to pay attention to the ignition system.
- The first thing to do is check the spark on the candles. To do this, we unscrew one candle, insert it into the candlestick, lean it against the "mass", best of all against the engine head. Next, we ask the assistant to look, and we ourselves turn the starter. The spark should be stable, bluish in color. If it is red, then such a candle should be replaced.
- Further, if there is no spark, you need to look at the cable that is bolted to the bell of the box. It must be sealed securely, the contact must not be oiled. Ideally, run a separate cable to the motor. It is desirable with a cross section of at least 12-15.
- If there is still no spark, we take out the central high-voltage wire from the distributor cover, be sure to take it with pliers and attach it to the block head with a gap of about half a millimeter, or a little more. Then we turn the starter to see that there is a spark. If it is, then the malfunction lies in the distributor. We will come back to this point.
- When there is no spark, then you need to check the ignition coil and check the voltage at the contact "K" (2 wires are screwed on it. " fuses For testing, you can duplicate the wire from contact 15 of the ignition switch.
- Well, back to the distributor malfunction. First, you need to check the gap in the breaker contacts, if, of course, they are. It should be 0.4 mm.
- You also need to check the integrity of the resistor that is installed in the slider.
- If everything is in order, then you need to set the ignition correctly.
On this, perhaps, we will finish with the carburetor engine. Of course. If the VAZ engine does not start, gasoline comes in, there is a spark, the ignition is set correctly, then the compression should be checked. She in the "Zhiguli" engine should not be less than 11.
VAZ 2107 injector does not start
With an injection engine, everything is a little easier 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 lamp that will light up in the event of a malfunction in the ignition system. The error code in this case will start with P03XX. That is, cylinder misfires. Of course, you must first check if there is a spark. There are several diagnostic methods that you should pay attention to:
- Diagnostic scanner. There is nothing difficult here. If there is an error, then everything is much easier than when there are no errors at all. In this case, we check the part itself, and then the reasons, if it is working properly.
- Ignition module. There are several ways that you should try for verification, but the most reliable is to go to the store and take it for verification with a check. You can immediately talk about how to return in case of serviceability of your own. Of course, not all shops will do this, but most will agree.
- The vaz engine does not start it for one reason. This is quite common among car enthusiasts. There are two transistors in the control unit, each of which is responsible for a pair of cylinders. Most often, they burn out at the same time, and the spark disappears completely.
If everything is normal with the spark, check the motor power supply. Again, we unscrew the candles and see if they are wet.
- If the candles are dry, then you need to see if voltage is being supplied to the nozzles, to begin with. To do this, remove the connector from one, connect the tester probes to the connector and ground.
- After you are convinced of this, you need to measure the pressure in the fuel rail.
- Most likely, this is the fault. Therefore, it is necessary to check the fuel pump, first of all, the fuse that is responsible for it.
- It is easier to check the fuel pump by replacing it with a known good one, as with the ignition module.
The VAZ 2107 engine does not pick up speed, does not pull
It so happens that the VAZ engine does not pull. This is most often due to the low pressure in the rail. The engine starts normally, at idle it also works stably, but does not gain momentum. The thing is that in such modes, the gas pump requires increased performance, which it cannot provide.
If the VAZ engine does not pull on hot, then it is worth checking the air flow meter, as well as the candles. The article has already mentioned a red spark, and so, on a cold one they can be normal, but under the influence of temperature they become "punctured.
