What causes Audi a8 engine jitter?

There are usually several reasons for engine jitter. The most common cause of serious engine carbon deposition is that the throttle valve is too dirty or the fuel injector has too much carbon deposition, because the gasoline adsorbed on the carbon deposition after landing is sucked into the cylinder by the engine for combustion, and the combustible mixture of the engine is sometimes rare and thick, which leads to idling jitter after cold start. Solution: The company cleans the oil circuit, and checks whether the idle motor has carbon deposit, so it should be cleaned.