What is the normal range for engine idle vibration?

[LilahDella]

Automobile engine vibration should be smooth and regular under normal conditions. Precautions when the car engine vibrates: If you can clearly feel that the engine vibration has recently increased, it should be inspected. Typically, abnormal vibrations include the following types: high-speed vibration, idle vibration, and in some cases, even jumping phenomena. When driving at a certain speed, the steering wheel may noticeably vibrate or jump, but this is not obvious at low speeds. It is best to seek help from professional testing equipment because subtle deformations in the tie rods, suspension, or wheel hubs are difficult to detect with the naked eye. Causes of engine idle vibration include: Vibration at idle could be due to a dirty throttle valve or excessive carbon deposits in the fuel injectors and intake passages. In cold conditions, carbon deposits can absorb some of the fuel. If the fuel does not completely enter the cylinder for combustion, it can lead to unstable idle, vibration, and in severe cases, difficulty starting.