What are the reasons for severe shaking in Audi A7?

[LeEmilio]

Audi A7 severe shaking reasons are as follows: Severe engine carbon deposits: The most common cause of car shaking is a dirty throttle or excessive carbon deposits in the fuel injectors. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold start injector will be largely absorbed by the carbon deposits. Engine misfire: Engine misfire mainly refers to one or more cylinders not working properly, manifested as obvious intermittent exhaust gas flow from the car, severe shaking of the exhaust pipe, and noticeable engine vibration, sometimes accompanied by a sputtering sound. This is mostly related to ignition coil failure. Engine combustible mixture sometimes lean and sometimes rich: Causes idle shaking after cold start. The lower the temperature, the more fuel is needed for cold start, and the presence of carbon deposits will affect the smoothness of the cold start.