Sitting in the car when the car is idling feels a little shaky.

When sitting in the car at idle speed, I feel slightly shaken. The most common reasons are that the throttle valve 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 injector will be absorbed by a large amount of carbon deposit during cold start, which leads to the lean mixture during cold start and the difficulty in starting.

1. The gasoline adsorbed on the carbon deposit on the back of the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, which will thicken the mixture and dilute and concentrate the combustible mixture of the engine, resulting in idling jitter after cold start.

2. Check the working conditions of spark plugs, high-voltage lines and ignition coils. Poor ignition system and poor spark plug misfire can also lead to such failures. The solution is to check whether there is too much carbon in the spark plug and replace the spark plug.

3. After cleaning the engine carbon deposit, cleaning the throttle, replacing the oil pad and spark plug, it is still found that the car 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. If the oil supply pressure of the oil pump is abnormal or the value of the intake pressure sensor is wrong, the car body will shake.

4. Car jitter is also related to the aging of engine feet. The engine foot is actually the damping system of the engine. The engine foot is responsible for absorbing slight vibration when the engine is running. If there is something wrong with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing idling jitter.