Bmw E9090000 km idling jitter cleaned the throttle, changed the spark plug, and checked the cylinder. There was no problem, or the idling almost stopped.

Not cleaned, use advanced cleaning agent to clean the oil circuit. Cars used to be like this. Many parts have been changed, but the effect is not good, there is no fault and no fault code. Idle vibration, heavy odor and fumes when starting in the morning. Under the guidance of an old master in the repair shop, it is good to clean the oil circuit. It is also caused by long-term poor combustion. He added three kinds of fuel additives to the fuel tank, and after adding three boxes of oil, he never fought again.