What's wrong with the feeling of idling?

The cars in Pacific Auto Network feel pumping when idling, which is idling jitter, indicating that the carbon accumulation in the car is very serious, resulting in the low concentration of mixed gas in the car and unable to provide enough power for the car. In addition, poor working conditions of ignition system and spark plug can also lead to such failures.

Dirty throttle or faulty throttle can also cause idling jitter. Dirty throttle is mainly caused by carbon deposition at the joint of throttle valve plate shaft and throttle body, which leads to inaccurate throttle opening, so idling jitter will occur. You can clean the throttle first. If it doesn't shake after cleaning, it means the throttle is dirty. If it still shakes after cleaning, it may be that the throttle assembly is damaged and needs to be replaced.

After long-term use, the ignition gap and time control of spark plug will be different, but ECU can't diagnose this deviation and still treat it equally, which leads to errors in practice and theory. As a result, some cylinders generate small power, which will lead to jitter. (Photo/Text/Photo: Pacific Auto Network Wu Jiahong)