In 2008, after the overhaul of Passat, cool car would shake for a few minutes. What is the reason?

1. The most common cause of serious engine carbon deposition leading to vehicle jitter is that the throttle valve is too dirty or the fuel injector has too much carbon deposition. Solution: clean the oil circuit, check whether there is carbon deposit in the idle motor, and clean it. 2. Ignition system problems Check the working conditions of spark plugs, high-voltage lines and ignition coils. Poor ignition system and poor spark plug misfire can also lead to such failures. Solution: Check whether there is too much carbon deposit in the spark plug and replace the spark plug. 3. The oil pressure is unstable. If the engine carbon deposit has been cleaned, the throttle valve has been cleaned, the oil pad and spark plug have been replaced, and the body is still shaking at idle speed. I suggest you go to the 4S shop to check whether the oil supply pressure and intake pressure sensors are normal. If the oil supply pressure of the oil pump is abnormal, the numerical error and poor work of the intake pressure sensor will cause the body to shake. Solution: Check the oil pressure and replace parts if necessary. 4. Aging of engine parts Vehicle jitter is also related to the aging of engine feet (also known as claw pads). The engine foot is actually the damping system of the engine. The engine foot is responsible for absorbing slight vibration when the engine is running. If there is something wrong with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing idling jitter. Solution: Replace parts.