What Causes Slight Body Vibration at Idle Speed?

[SanMax]

Causes of slight body vibration at idle speed include aging engine mounts, excessive carbon buildup, and fuel supply system malfunctions. Below are detailed explanations: Aging Engine Mounts: Deterioration of engine components, such as aging engine mounts. Engine mounts serve as the vibration damping system for the engine, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations can transfer to the steering wheel and cabin, causing noticeable shaking at idle. Excessive Carbon Buildup: Severe carbon deposits in the engine cylinders can clog spark plugs and valves, directly leading to vehicle vibration at idle. If the car's acceleration performance declines and the shaking persists, it's necessary to clean the engine cylinders. Fuel Supply System Malfunction: Unstable fuel pressure can cause inconsistent air-fuel mixture concentrations, resulting not only in vibration but also unstable idle speeds. It's advisable to replace the fuel filter and check the fuel pressure at the filter.