Why does the Audi A6L jerk when starting without accelerating after warming up?

[DiAnderson]

Audi A6L jerking when starting without accelerating after warming up can be attributed to the following reasons: 1. Increased carbon deposits in areas such as the throttle body, intake tract, and valves. These deposits absorb some gasoline when the engine is cold, and when the engine warms up, the gasoline evaporates, leading to an overly rich air-fuel mixture during idle. 2. The throttle body is a controllable valve that regulates the air entering the engine. After the air enters the intake manifold, it mixes with gasoline to form a combustible mixture, which then burns to produce power. It connects to the air filter at the top and the engine block at the bottom, often referred to as the throat of the car engine. 3. Under normal usage, the throttle body should be cleaned approximately every 20,000 kilometers. If the vehicle is used in an area with poor environmental quality and high levels of dust particles in the air, it is recommended to clean it about 1,000 kilometers earlier.