When driving at low speeds, the Audi A3 lurches and lurches as if it's misfiring.

There are three reasons why the cool Audi A3 car rushes at low speeds like a dud. According to the request for relevant information, the three reasons are:

1. The spark plug is damaged. Gaps at both ends of the spark plug cause insufficient ignition, the mixture cannot be completely burned and. the car will shake.

2. The quality of the gasoline is poor and the atomization of the injector is incomplete, resulting in insufficient combustion of the mixture.

3. There is a problem with the ignition system and it cannot produce enough sparks.