What is the idling jitter of Buick Sail?

The phenomenon of engine idling jitter, combined with comprehensive analysis of cases, is the cause of carbon deposition in throttle and intake system;

1, carbon deposit in intake system; That is to say, there are a lot of colloidal carbon deposits near the valve seat and around the idle motor, which leads to the mixture being too rich and too thin. Will form the phenomenon of idle jitter, especially when the cold car starts.

2. The throttle valve is too dirty; Because there is too much colloidal carbon or dirt around the throttle valve plate, the cross-sectional area of the air passage will change, so that the control unit can not accurately control the idle intake, resulting in too rich or too thin mixture. Therefore, ECM repeatedly adjusts the idle speed to reach the standard value, which leads to your "deviation" now, which will cause flameout in serious cases. To sum up, it is recommended that you go to a repair shop for cleaning. The phenomenon of vehicle wading may also cause the above phenomenon, mainly the loss of idle value, so it is recommended to go to a repair shop for matching. Secondly, for the phenomenon of trunk sealing strip, it is recommended to go to the repair shop for paraffin maintenance, which is a common situation, not a fault.