What Causes Body Vibration When a New Car Reaches 80 mph?
1 Answers
Body vibration when a car reaches 80 mph is caused by severe engine carbon deposits, a dirty throttle body, or excessive carbon buildup in the fuel injectors. Other reasons include ignition system issues, unstable fuel pressure, and aging engine components. Ignition System Issues: Check the working condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or weak spark plug firing can also lead to such symptoms. Unstable Fuel Pressure: If you have already cleaned the engine carbon deposits, cleaned the throttle body, replaced the oil pads and spark plugs, but still notice body vibration at idle, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor. Abnormal fuel pump supply pressure or incorrect readings and poor performance of the intake pressure sensor can also cause body vibration. Solutions: Check the fuel pressure and replace components if necessary. Inspect the spark plugs for excessive carbon buildup and replace them if needed.