Gs4 white line presses the car to swing back and forth in rainy days.

1, gs4 jitter causes too much carbon and dirt on the throttle valve and the surrounding air intake, and the cross-sectional area of the air passage changes, which makes the control unit accurately control the idle intake air volume, resulting in too rich or too lean mixture and abnormal combustion.

2. The common reasons are: the throttle has oil pollution or carbon deposition, the air inlet around the throttle has oil pollution, and the idle stepper motor and duty ratio solenoid valve have carbon deposition. Therefore, it is necessary to clean the throttle regularly. According to search.