Why Do I Feel Vibration When Idling in the Car?
1 Answers
The reasons for feeling vibration when idling in the car are as follows: 1. The most common reason for feeling slight vibration when idling in the car is a dirty throttle body or excessive carbon buildup in the fuel injectors. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold-start fuel injector will be largely absorbed by the carbon deposits, resulting in a lean air-fuel mixture during cold starts and making it difficult to start. The gasoline adsorbed on the carbon deposits will then be sucked into the combustion chamber by the engine's vacuum, enriching the air-fuel mixture. This fluctuation between lean and rich mixtures causes idle vibration after a cold start. 2. Check the condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or weak spark from the spark plugs can also lead to such issues. The solution is to check if the spark plugs have excessive carbon buildup and replace them if necessary. 3. If you have already cleaned the engine carbon deposits, cleaned the throttle body, replaced the oil pads and spark plugs, but still notice body vibration during idle, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor. Abnormal fuel pump pressure or incorrect readings and poor performance of the intake pressure sensor can also cause body vibration. 4. Car vibration can also be related to aging engine mounts. Engine mounts are essentially the shock absorption system of the engine, responsible for absorbing 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 during idle.
