Vibration in the cabin at idle. Computer diagnostics of a car

The number of motorists is increasing from year to year. The problems that arise do not change, just the scales become a bit different. Indeed, if, for example, in one case a thousand vibrations occur in the passenger compartment at idle speed, on the whole this does not cause any special fears. But when do the drivers already have tens of millions? Horrifying scales, however. In general, nothing particularly terrible in such current problems there.

What is idling?

Of course, before you figure out why there is a vibration in the cabin at idle, you need to understand what is going on in the car. So, this is a special mode of operation of the motor, in which the car does not move from its place. Used during short-term stops, so as not to muffle the engine near each traffic light.

During this mode of operation, the engine speed is maintained at a speed that allows the entire mechanism to be kept warm. If an imbalance occurs, this leads to malfunctions and interruptions, and eventually to the shutdown of the unit.

An interesting point is also that for injector cars, the lambda probe is warmed up to the operating temperature already at idle. This allows you to carry out computer diagnostics of the car, because the on-board computer is working in the normal mode.

Some modern models, such as the Toyota Prius, do not have this mode of operation at all. This creates certain difficulties during the technical inspection, but the problem is solved by the inspection regime. However, this is a feature of only the same "Prius".

Vibration of the motor

From time to time, such a nuisance happens. Especially often this happens when the machine has been in operation for a long time.

In general, this does not necessarily cause a change in the cabin. But from time to time it happens that the impulse continues to be transmitted, even if not in the entire salon. In such cases, the vibration begins on the handlebar at idle speed.

To appear without any reason, it can not - it's just a signal about a certain malfunction. If we talk about changes in work in idle mode, then this is already quite a dangerous sign.

What kind of vibration can there be?

If we are not talking about permanent problems that occur during the whole cycle of work, then in this case it is necessary to talk about something certain. Mechanics, as well as motorists, call this unstable vibration.

In addition to the topic that has already been touched, another machine can tremble and twitch at high speeds, with a warm engine or, conversely, at high temperatures.

All of them have similar features and differences, but the main thing here is that you can not ignore the problem. In the end, everything may not end very well for you, because all the expenses for repairs fall on your shoulders.

Why does the vibration begin?

Sometimes it is difficult to determine what triggered the whole process. The fact is that you first need to find out when exactly the machine starts to yank. Sometimes it is not easy to do, but it is absolutely necessary.

The very reasons can sometimes be mysterious and mysterious. Indeed, in car repair shops you can often hear explanations like: "Everything was fine, and then shake the beginning." Naturally, it is necessary to collect the "anamnesis" in more detail - what kind of repairs were carried out, the quality of the roads, which were recently visited, etc.

Replacing the crankshaft

Strangely enough, but this is a very common reason. People at the plant can overlook - and this will lead to problems you already know. Indeed, if the balancing of the crankshaft with the flywheel has not been carried out, or has been, but incorrectly or hastily, this will just cause the vibration to arise at idle. VAZ (cars of any model), by the way, often suffer from such a problem.

It is solved by all by contacting the service center, since it is not worthwhile to perform independent repairs. This can be dangerous for the car, and as a consequence, for you.

There is another option with a broken crankshaft. But there the shaking will be such that it's unrealistic to miss the ears. This happens quite rarely, so there should not be much concern about this.

Trouble engine

This is the second reason for the shaking. Actually, the problem is that one of the cylinders refuses to work. Vibration in the passenger compartment at idling speed may appear under other operating conditions.

In fact, just the jolting will be the smallest of your problems if the motor starts to touch. The bottom line is that the power falls proportionally to the number of cylinders. For example, for a four-cylinder motor, the failure of one will be equal to a loss of a quarter of the power. Naturally, this will be felt immediately.

The solution to the problem is as follows. You need to contact a specialist or try to figure it out yourself. Even a strong vibration at idle will disappear if it appears due to a problem with the cylinder.

If you do not pay attention to such a problem, this will lead to very rapid wear of the parts. So do not delay the repair, especially if you are already sure of the reasons.

Fasteners

If we consider the causes of engine vibration at idle, we can conclude that improper fixing is almost the most common of all of them.

In general, this is not always associated with the fasteners themselves - often the problem is wear and tear. For example, pillows or other similar elements. To check if your theory is correct, you need a second person who will sit behind the wheel and turn on the alternately neutral, reverse and first gear. Thus, you can determine whether there is any deviation from the norm in any position - in fact, ideally they should deviate to the same angle. Regarding the latter: if the motor is falling in some direction, then this is a signal to the fact that you need to replace.

Also you need to know that the vibration in the cabin at idle is not necessarily caused by the engine. The fact is that it can be certain adjoining details. In combination with a destroyed pillow, which should hold the whole mechanism as a whole, this leads to the fact that any part is adjacent to the body from the inside, which causes vibration in the cabin.

Improper repairs

Another cause of trembling in the cabin may be poor-quality home repairs. Strictly speaking, that's why usually in the councils initially refers to the appeal to the service.

The essence of the whole problem is not even in the repair done at home, but in the fact that it was not. It happens that the engine starts to knock right on the road. You are repairing it on the roadside, but only so that you can reach your destination. Of course, in your plans there is an option that you will need to check everything in your garage. But often such things are simply forgotten.

Balancing shafts

Consider this as the cause of vibration on the idle - a step is rather questionable. The fact is that this is actually a solution to the problem, not its source. But sometimes the cause and effect change places.

Such shafts are put on machines with engines that are prone to shaking and shaking. In some cases, this step is justified, but not always.

The sense here is this: if the installation is not done properly, then the walls will eventually split their walls, which will only lead to an increase in vibration, and not to its absence. However, this is also not so common and should be described in the specification of the car.

Vibration of the diesel engine at idle speed

Here you need to know just a few things. Most of the causes of any trembling or shaking in a similar engine are exactly the same as those described above. But there are also some features.

For example, any severe contamination of the fuel delivery system will cause vibrations. This happens more often than you might think, because any of the nodes of the mechanism can become the cause. The engine, as you know, is a rather complicated piece, and therefore there are a lot of problem areas too.

Pollution, in turn, can also be caused by several reasons. For example, if gasoline or air that enters the internal combustion engine contains a high percentage of foreign impurities. In addition, there is a second option - a mixture of liquid and gas can be burdened with water. This, too, will lead to far from the best consequences for the motor.

Diagnosis of vibrations on idle

Naturally, drivers are interested in the question of what they can do to diagnose, and then correct the situation. Actually, this is the only thing that should worry the responsible car enthusiast.

To regulate the operation of the engine at idle, there are several key nodes. First, of course, we need to say about the injector or the carburetor - this is due to the fact that they enter the fuel system, and from here the contamination, which was mentioned just above, can go.

Next, you need to check the mechanical sensors of the fuel pressure regulator, as well as other engine components, which can generally lead to shaking.

VAZ idling

For owners of domestic cars of this brand, the issue of engine operation in this mode is a sore point. Problems happen quite often, and the repair that follows the detection of a malfunction is usually quite expensive, and even laborious.

Below, the reasons why the VAZ idling speed can float :

1. Pay attention to the mass air flow sensor.
2. Also it is necessary to check carefully the regulator of idling - the second most common cause of problems.
3. The speed sensor, or rather the adjacent wiring, can become a source of trouble.
4. The next step is to check the crankshaft position sensor. He himself hardly broke, but again, the wiring or the chip suffered.
5. In addition, you need to check and throttle, which regulates it. In any case, it will be useful to clear the dirt. Also you should check the sensor of its position.
6. As you have already understood, the wiring often becomes the cause of all troubles - so do not be lazy to check everything that is possible, if no other faults are found. At the same stage, it will be a good idea to check the candles.
7. There is one more option - the solenoid valve of idling. Its verification can be a bit laborious, but it's worth it. In the case when everything is fine here, pay attention to the jet.

Conclusion

Most of the reasons that can generally cause vibrations and shaking of different perspectives in the cabin or on the steering wheel of the car have been described above. Actually, almost all such cases are connected with the engine or with the equipment attached to it.

If you have a modern unit with an on-board computer, computer diagnostics of the car will help you. The electronic assistant will quickly determine the true cause of the malfunction in your machine.

Thus, it is easiest to determine the source of the problems, since computer diagnostics of the car tracks the operation of all machine systems.

Let's repeat once again the advice on contacting a car service center. Vibration is a serious enough problem that should not be ignored. It is fraught with such consequences, you will have to pay for it. And the price is quite high, especially given that the solution could be found in the early days.

So, we found out why the car has a vibration in the cabin at idle and how to eliminate this problem with your own hands.