Why does the engine stall and how to fix the problem?

Causes of malfunction

Before we begin to analyze the issue, it is worth understanding that the power unit requires certain components in order to function. An engine requires four components to run properly: air, fuel, spark and functioning electronics.

Based on this, you can determine exactly where the fault may be hidden and identify the main components. The VAZ 2115 engine is having problems with the 8-valve injector, where to look for the reasons:

• Sensors and ECU.
• Fuel, as well as its supply components.
• Air.
• Sparking.

Injector malfunction

Trouble the VAZ-2115 engine? This may be due to faulty injectors. This happens if:

• the injector is faulty (this is quite rare);
• low-quality fuel is used;
• injectors require cleaning;
• The power or control circuits to the injector are shorted or completely broken.

If one of the sensors does not work, an error will appear on the dashboard, which will serve as a kind of scanner. But if the error does not appear, then the problem lies precisely in the mechanical part.

And it also happens that it is simply not possible to find the reason why the engine is tripping. In this case, it is necessary to use computer diagnostics of the car, after which the cause of the tripping will become completely clear. As a rule, a motor malfunction of this kind can only be detected by a specialist. Therefore, it is best to contact professional service centers. This will help save both time and your own money.

Elimination methods

To correctly find the problem and fix it, the motorist should have knowledge of the design of the engine and its systems, as well as have the tools. A very indispensable element is time and hands growing from the right place. So, now you can begin to analyze the processes aimed at troubleshooting the problem.

Sensors and ECU

Many car repair mechanics recommend checking the software and meters, of which there are quite a lot in modern cars, before getting into the mechanical part.

So, first you should connect to the electronic engine control unit and carry out diagnostics using special software. The vehicle owner will need a USB-car cable, called K-line or OBD II, a tablet and the appropriate software.

After connecting and identifying the automotive equipment, it is worth carrying out diagnostic operations. If a software failure is detected, it must be removed and the system restored to functionality.

Also, the diagnostics will show which of the sensors has lost its functionality.

Which sensors are responsible for the normal operation of the engine, and their failure can lead to tripling of the power unit:

• Idle speed regulator. If this meter fails, then the engine will run cold. In this case, the engine will not only stall, but also have difficulty starting.
• Mass air flow sensor. Quite an expensive part in any car. Often, it does not fail, but the measuring grid becomes clogged. To restore operation, you need to clean the mesh.
• Crankshaft position sensor. It measures the number of engine revolutions, thereby regulating the supply of the amount of fuel mixture.
• The coolant temperature sensor affects the operation of the system indirectly, but can affect and create artificial tripping.

Fuel and its supply components

An integral element in the formation of the air-fuel mixture is fuel. So, not enough of it leads to the formation of a lean mixture, but too much of it leads to a rich mixture, which can flood the system.

The first thing you need to start diagnosing is the pump and filter. Clogged elements can lead to insufficient fuel reaching the injectors. The gasoline pump is located under the rear sofa, where it is quite easy to reach, but the filter element is mounted on the bottom behind the right rear wheel.

An injector is a fuel element that sprays fuel. The clogging of this unit affects the amount of fuel injected into the combustion chambers. Therefore, it is necessary to carry out diagnostics quite often. This is done using a special stand. If necessary, it is worth replacing the elements.

Air

Air supply elements are quite important because they directly affect the formation of the air-fuel mixture. So, a clogged throttle valve or its jamming will cause the car to suffocate, which will lead to the effect of tripping or it will stall. To clean this unit, it is necessary to dismantle the entire throttle valve. The part is cleaned using carburetor cleaning fluid.

Why does the VAZ 2110 8-valve engine trip: causes and methods of elimination

Many car enthusiasts and owners of a VAZ 2110 with an eight-valve engine encountered the fact that the engine began to trip. Of course, the majority immediately went to a car service center, where after short and simple operations everything returned to normal. In this article, we will look at the main reasons why the problem occurs and ways to solve it at home.

Fuel rail and injectors

The most common cause of engine tripping is a malfunction of the injectors and fuel rail. To eliminate the cause, it is necessary to disassemble this element. The fuel rail is inspected for cracks and deformations. But with candles, not everything is as simple as it seems at first glance.

To determine the performance of the elements, they need to be run through a special stand, which will show whether the injector will work. If they become clogged, they must be cleaned at a nozzle cleaning stand, and if the element is completely faulty, then replace it with a new one.

Air filter

The air filter remains a known problem with engine tripping. Thus, untimely replacement of this element can lead to insufficient or incorrect formation of the air-fuel mixture. This is due to the fact that a dirty filter leads to poor air permeability and the engine simply begins to choke.

To eliminate the problem, it will be enough to replace the air filter element. Since the VAZ engine has simple design features, any motorist can cope with this task without much difficulty. So, to replace the air filter you need to get into the engine compartment. Then, unscrew the four bolts securing the air filter cover and change the filter element.

Conclusion

It has been determined that the reason why the VAZ 2115 engine fails is the lack of one of the important elements: fuel, spark or air. It was also found that a VAZ may stall when cold due to a malfunction of sensors, such as the idle air control.

I drove today with a faulty coil... The car really pissed me off, and I assumed that it was the ignition coil that was the problem, but I wasn’t 100% sure, in the end I decided to look for a known working coil in order to see if it was the problem. The engine was severely troubled, there were misfires in the first cylinder. Sometimes the second one fell off. There wasn’t really a spark on the first one, and due to errors it only showed gaps in the first boiler. The car practically did not pull, and when switching to 2-3-4-5 there was vibration, so much so that it was impossible to drive. I got out of the situation by driving at 3-4k rpm. But this is not the case at all, so I went to the store, took a new reel, agreeing to return it “if it doesn’t fit.”

I went out, connected the terminal, the explosive wires, I started it, there was no tripping, the engine ran smoothly and without any complaints. Great, I think, now I’ll change in about 10 minutes and go. Yeah, fuck!

In our domestic basins, everything is done in such a way that the horseradish can be unscrewed and there is no harm in doing so. Everything was used, the whole set of keys, a lock defrost, a rag and a great desire to strangle the one who designed it.

The essence of the whole story is that the coil is held on a mount, which in turn is attached to the engine with three bolts, 13, 15 and 17. In addition, you cannot easily get to them. The coil itself in the mount should sit on 4 bolts, straightened out with a hexagon, but for some reason there were only two of them.

First, I unscrewed the bolt by 15, it is located on top and it was easiest to get to it. After that, I started working on the 13 bolt, it is located on the right and access to it is limited by the tube through which antifreeze runs (whatever is the correct name) and the throttle cable. I got out of the situation by removing the throttle cable (two bolts securing it in the manifold). It became easier, but still hemorrhagic. Somehow I unscrewed it. The third one, at 17, I just fucked it up. It is located at the bottom, and it’s definitely not easy to get there; I had to remove the tube going from the cylinder head to the engine, which was also in the way. Okay, I took it off, unscrewed it, saw the hex bolts, went to the store to get a hex head, bought it, tried to unscrew it, but it didn’t work... I had to fill the bolts with water so that the hex head wouldn’t rest on the oil and dirt. Somehow I took it off, it took an hour to do everything in -12 cold, I screwed the coil on and put everything back in the reverse order. For those who don’t know, the wires through the boilers go like this: to the left of the terminal on the coil is wire No. 1, therefore it goes to the 1st cylinder, and then 2, 3 and 4 wires go in a circle.

Troit on a cold VAZ 2115

When I start it in the morning, the engine does not run smoothly, as if it is shaking. Once it warms up everything becomes normal. What could it be? I went to the services and they didn’t help.

Answer to Poros

1. Candles as soon as possible.
2. I have the same crap! a friend of mine got rid of this by replacing the fuel pressure sensor or valve (I don’t remember the exact one) which is located near the ramp. I'm going to change it.
3. Then most likely spark plugs, well maybe also IAC, but unlikely.
4. Well, then it looks like the firmware is crooked or a glitch of some kind of sensor, I don’t understand which one