What Causes DMI Engine Vibration?

[VanJesse]

DMI engine vibration can be caused by severe engine carbon deposits, ignition system failure, or unstable oil pressure, as detailed below. Severe Engine Carbon Deposits: The most common cause of car vibration is a dirty throttle valve or excessive carbon buildup in the fuel injectors. When there is too much carbon inside the engine, the gasoline sprayed by the cold-start injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start the engine. Ignition System Failure: Check the condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or spark plugs can also lead to such issues. Unstable Oil Pressure: If you have already cleaned the engine carbon deposits, cleaned the throttle valve, and replaced the spark plugs but still notice body vibration at idle, you can inspect whether the fuel supply pressure and the intake pressure sensor are functioning properly. Abnormal fuel pump supply pressure or incorrect readings and poor performance of the intake pressure sensor can also cause body vibration.