Why is the car engine shaking?

The reasons for engine jitter are as follows:

1. Engine cylinder shortage: Engine cylinder shortage mainly means that one or more cylinders of the engine are not working properly, which usually manifests as obvious problems in the car. Intermittent exhaust gas flow, the exhaust pipe shakes violently, so the engine shake can be clearly felt, sometimes accompanied by sudden noises. This is mostly related to a faulty ignition coil.

2. The machine foot rubber is aging or loose: The machine foot rubber is the rubber block between the engine and the frame. Its function is to reduce vibration and buffering when the engine is working, and to fix the engine. Once these machine foot rubbers are aged or loose, the vibration of the engine will become very severe, and the effect will be much weakened after replacing the machine foot rubbers again.

3. Carbon deposits: Carbon deposits are always inevitable in cars, including cylinder carbon deposits, throttle valve carbon deposits, spark plug carbon deposits, intake carbon deposits, etc. When there is too much carbon deposit inside the engine, it will affect the car's ignition energy, air intake efficiency and mixing ratio, causing the car's power output to be unstable and causing jitter during idling and acceleration. It is recommended to go to a 4S shop to clean the engine.