What is the idling jitter of Ruifeng m3 engine?

Idle jitter of Ruifeng m3 engine may be caused by dirty throttle or faulty throttle. Dirty throttle is mainly caused by carbon deposition at the joint between the throttle valve plate shaft and the throttle body, which leads to inaccurate throttle opening and idling jitter. So, we 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. As a reminder, since all vehicles now use electronic throttles, it is necessary to learn idle speed again after cleaning the throttles. Poor gasoline quality leads to poor atomization effect of injector, insufficient combustion of mixed gas in cylinder, and also leads to idling jitter. It is recommended to clean the fuel system with high-grade gasoline after using this box of gasoline. The spark plug does not ignite, resulting in one or more cylinders not working, which also leads to idle jitter. Check the lower spark plug If the ceramic part of the spark plug is cracked, check whether the lower ignition module is normal.