What is the cause of car jitter?

The causes of automobile jitter are serious carbon deposition in the engine, unstable oil pressure and engine cylinder shortage.

1, engine carbon deposition is serious: cars always have carbon deposition problems, including cylinder carbon deposition, throttle carbon deposition, spark plug carbon deposition, intake carbon deposition and so on. When the engine has too much carbon deposit, it will affect the ignition energy, intake efficiency and air-fuel ratio of the automobile, resulting in unstable power output, idle speed and acceleration jitter.

2. Unstable oil pressure: If you have cleaned the engine carbon deposit, cleaned the throttle and replaced the oil pad and spark plug. And the body is still shaking when idling. 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 intake pressure sensor is wrong and works badly, it will lead to the body shaking.

3. Engine cylinder shortage: Engine cylinder shortage mainly refers to the abnormal operation of one or more cylinders of the engine, which is generally manifested as: the exhaust gas flowing out of the car is obviously intermittent, the exhaust pipe is violently shaken, and the engine jitter can be obviously felt, sometimes accompanied by abnormal noise. This is mostly related to ignition coil failure.

Harm of automobile jitter

1, which aggravates the phenomenon of carbon deposition in automobile engines, and the most common reason for automobile jitter is that the throttle valve is too dirty or the fuel nozzle has too much carbon deposition. 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.

2. The damage of the spark plug of the car. If the automatic start jitter of manual gear is not handled in time, it will do harm to the spark plug of automobile and even the whole ignition system of automobile. In severe cases, it will also cause poor ignition of the car and flashover of the spark plug.

3. Accelerate the aging process of engine parts. 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.