What causes the car to shake seriously when driving?

What causes the car to shake seriously when driving?

There are many reasons for car body shaking during driving, such as tire dynamic balance, or wheel hub balance weight falling off, mud in wheel hub, aging of chassis rubber parts, large difference in toe-in and inclination angle data, which leads to fast car speed, loose chassis suspension and road feedback.

If the shaking and vibration are obvious during driving, it is affected by the deformation of the transmission shaft, the deformation of the hub and the misalignment of the tire dynamic balance. If the idling vibration is obvious, it is caused by poor working of the spark plug and ignition coil, aging of the machine foot pad, insufficient oil pressure, excessive carbon deposition in the intake system, and too small opening of the throttle body.

First, the vehicle vibrates obviously during driving, most of which are caused by chassis suspension and tires.

In particular, the tire counterweight is unbalanced, such as excessive accumulation of dust and dirt in the steel ring, which will affect the inaccurate dynamic balance data, and then cause abnormal shaking and vibration of the vehicle. This problem can be solved by removing tire rims and re-balancing them. In addition, the damage of the chassis may also affect the vibration of the car, such as the bending deformation of the transmission shaft and the deformation of the wheel hub. Most of these problems are basically caused by the collision of chassis. As long as the damaged objects are treated and replaced, the problem of vibration can be solved.

Second, the vehicle vibrates when idling.

Most of them are affected by excessive carbon deposition in spark plugs and aging of ignition coils. To solve this problem, replacing a new set of spark plugs and ignition coils can eradicate the fault problem.

There are several reasons why the whole car shakes when it hits the car.

The first engine has carbon deposit, which may be serious.

When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel injection head will be absorbed by the carbon deposit during the cold start, which leads to the lean mixture during the cold start and makes it difficult to start. In this case, only when the gasoline adsorbed by carbon deposits is saturated, it is easy to hit the car. After landing, the gasoline adsorbed on carbon deposits will be sucked into the cylinder by the vacuum suction of the engine for combustion, which will thicken the mixture and cause idling jitter after cold start. Solution: Clean the oil circuit and check whether there is carbon deposit in the idle motor.

When the vehicle rotates, the gasoline sprayed from the fuel nozzle is absorbed by a large amount of carbon deposits. Because the mixture is too thin, it affects the vibration and vibration of the vehicle. When solving this kind of problem, it is necessary to remove the carbon deposit inside the engine.

There may be something wrong with the second ignition system.

First, check the working conditions of spark plugs, high-voltage fuses and ignition coils. Poor ignition system and poor spark plug misfire can also lead to such failures. Solution: Check whether there is too much carbon deposit in the spark plug and replace the spark plug.

The third oil pressure is unstable

If all the above problems are cleared, there is still jitter. I suggest you go to the 4S shop to check whether the fuel pressure and intake pressure sensors are normal. If the oil supply pressure of the oil pump is abnormal or the value of the intake pressure sensor is wrong, it will cause the body to shake.

Causes of occasional jitter when the car is driving

1. Serious carbon deposit in the engine: The most common reason for vehicle jitter is that the throttle is too dirty or the fuel injector has too much carbon deposit. When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel injection head will be absorbed by a large amount of carbon deposit during cold start, resulting in too thin distribution gas during cold start and difficult start.

2. Ignition system problems: Check the working conditions of spark plugs, high-voltage lines and ignition coils. The ignition system is not easy to use, and the spark plug is not in good condition, which will also lead to this failure.

3. Unstable oil pressure: If you have cleaned the engine carbon deposit, washed the throttle, changed the oil pad and spark plug, etc. You still find that the body is shaking at idle speed. I suggest you go to the 4S shop to check whether the oil supply pressure and intake pressure sensors are normal.