Where can Changle specialize in Jetta cars, when idling?

Idle chatter, just cleaning the throttle can't solve the problem. It may be mainly caused by excessive carbon deposition in throttle, air intake, air intake valve and combustion chamber. Due to too much carbon and dirt in the air inlet, the cross-sectional area of the air passage changes, which makes the control unit unable to accurately control the idle intake air volume, resulting in too rich or too thin air mixture, abnormal combustion or engine jitter, and even unable to start after starting. Mainly use an endoscope to check whether there is too much carbon deposit in the air inlet, intake valve and combustion chamber. At the same time, check the working state of the fuel injector, as well as the spark plug and idle motor. Mind you, it's about 30,000-40,000 kilometers, so it's necessary to thoroughly check and clean up the carbon deposit.