Slight Vibration During Car Idling?
2 Answers
Car idling with slight vibration may be due to severe engine carbon deposits or issues with the ignition system. The specific related content is as follows: 1. Severe engine carbon deposits: The most common cause of car vibration is a dirty throttle or excessive carbon deposits in the fuel injector. 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 excessively lean mixture during cold start, making it difficult to start. 2. Unstable oil pressure: If you have already cleaned the engine carbon deposits, cleaned the throttle, replaced the oil pad and spark plugs, etc., and still find the car body shaking during idling, it is recommended to go to a 4S shop to check whether the fuel supply pressure and the intake pressure sensor are normal. If the fuel pump supply pressure is abnormal or the intake pressure sensor value is incorrect or malfunctioning, it will cause the car body to shake. The solution is to check the oil pressure and replace parts if necessary. 3. Aging engine components: Car vibration is also related to the aging of engine mounts. Engine mounts are actually the shock absorption system of the engine. Engine mounts are responsible for absorbing the slight vibrations of the engine during operation. If there is a problem with the engine mounts, these vibrations will be transmitted to the steering wheel and the interior of the car, causing vibration during idling.
Slight vibration at idle is quite common, and I've experienced it myself. It's usually caused by excessive carbon buildup in the engine or aging spark plugs. Carbon deposits can lead to incomplete fuel combustion, making the engine run unevenly and causing the car to shake. Regular highway driving can help flush out some carbon deposits, or periodic throttle body cleaning is also effective. Worn-out spark plugs that aren't replaced can easily cause vibration too - this is something you can check or replace yourself without much difficulty, solving the problem at minimal cost. Loose engine mounts can also cause this issue, as those rubber mounts deteriorate over time and need tightening or replacement. While minor vibration doesn't significantly affect driving safety, ignoring it may accelerate wear. During routine maintenance, it's wise to have a technician check the idle system to prevent bigger problems down the road.
