12 Passat 2.0 self-priming step on the accelerator where does the accelerator ring?

At present, the throttles are all electronic throttles, and it is naturally the motor that controls the opening and closing of the valves. When the motor gear is worn, the bite is not sufficient, resulting in abnormal sound. When there is too much carbon deposition in the throttle, it will also cause abnormal noise in the throttle. The throttle can be cleaned. If the motor is damaged, remove the throttle and replace the servo motor.