What Causes Engine Idle Vibration?

[KiraRose]

The causes of engine idle vibration include: unstable operation of engine cylinders, excessive carbon deposits in the cylinders, electrical circuit issues, aging of engine mounts, and problems with the ignition system. If the ignition coil malfunctions, it will directly cause abnormal spark plug firing, leading to continuous vehicle vibration. Excessive carbon deposits in the cylinders can also result in unstable idle and vibration. The reasons for excessive carbon deposits in the cylinders include prolonged idling in place and substandard gasoline causing incomplete combustion. Excessive carbon deposits in the cylinders can lead to poor spark plug ignition, causing abnormal engine vibration. Additionally, excessive carbon deposits in the combustion chamber can block the valves, obstructing air intake and resulting in abnormal engine vibration.