Car body vibration causes introduction: 1. Severe engine carbon deposits: The most common cause of car vibration is a dirty throttle body or excessive carbon buildup in the fuel injectors. When there is too much carbon deposit inside the engine, the gasoline sprayed by the cold start injector will be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts, making it difficult to start. 2. Ignition system issues: Check the working condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or improper spark plug firing can also lead to such faults. 3. Unstable oil pressure: If you have already cleaned the engine carbon deposits, cleaned the throttle body, replaced the oil gasket and spark plugs, but still notice body vibration at idle, it is recommended to visit a 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal. Abnormal fuel pump supply pressure or incorrect readings and poor performance of the intake pressure sensor can both cause body vibration. 4. Aging engine components: Car vibration is also related to aging engine mounts. Engine mounts are actually the shock absorption system of the engine. They are responsible for absorbing the minor vibrations during engine operation. If the engine mounts are faulty, these vibrations will be transmitted to the steering wheel and the cabin, causing vibration at idle.
