Things about "car shock"

Things about "car vibration"

Vibration of the car body is found while driving

1. If the car body is found to vibrate or shift slightly while driving. , usually the fault is caused by the tires. First of all, it may be that the tire balance is not in good condition, and the car owner needs to do a four-wheel alignment and dynamic balancing as soon as possible. If the vehicle does not deviate, just do a dynamic balancing of the tires.

2. Another situation is more serious, which may be caused by the deformation of the steel ring, which requires the car owner to go to a professional repair shop for inspection. This situation generally occurs in vehicles with a long service life. . Generally, when a car is replaced with new tires and new steel rims, it is necessary to balance the tires. Otherwise, the steering wheel will easily shake when the weight is uneven. Body shake will have an impact on driving comfort and control judgment.

3. The third situation is caused by the unbalanced deformation of the transmission shaft. Generally, this situation occurs when there are many cars that have collided with the chassis.

Vehicle body shaking at idle speed

Vehicle body shaking at idle speed is a common situation encountered by many car owners. If the car owner notices obvious body shaking when starting or stopping the vehicle without turning off the engine, it may mean that the vehicle has the following three conditions:

1. Serious carbon deposits in the engine

The most common cause of car shaking is that the throttle valve is too dirty or the fuel injection nozzle has too much carbon deposits. When there is too much carbon deposit inside the engine, the gasoline ejected from the cold start fuel injection head will be absorbed by the carbon deposit, causing the cold start mixture to be too thin, making it difficult to start. In this case, the only way is to wait until the gasoline absorbed by the carbon deposit When the car is saturated, it is easier to start the car. After the car is started, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the engine's vacuum suction for combustion, and the mixture will become richer. The combustible mixture of the engine is sometimes thin and sometimes rich, resulting in a cold start. Idle vibration. The lower the temperature, the greater the amount of oil required for cold start, and the presence of carbon deposits will affect the success of cold start.

Solution: Clean the oil circuit and check whether the idle motor has carbon deposits and should be cleaned.

2. Ignition system problems

Check the working conditions of the spark plugs, high-voltage wires and ignition coils. Poor ignition system operation and poor spark plug flashover conditions will also cause this type of malfunction. .

Solution: Check whether the spark plug has excessive carbon deposits and replace the spark plug.

3. The oil pressure is unstable

If you have cleaned the engine carbon deposits, washed the throttle, replaced the oil gasket and spark plugs, etc., and still find that the car body shakes when idling, it is recommended that you go to the dealer The 4S shop should check whether the fuel supply pressure and intake pressure sensor are normal. If the fuel supply pressure of the fuel pump is abnormal, the intake pressure sensor value error and poor operation will cause vehicle body vibration.

Solution: Check the oil pressure and replace parts if necessary.

4. Aging of engine parts

Car vibration is also related to the aging of the engine feet (also known as the claw pads). The engine foot is actually the engine's shock absorber system. The engine foot is responsible for absorbing the subtle vibrations of the engine when it is running. If there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and the cab, causing vibration at idle speed.

Solution: Replace parts.