Chuanqi GM8 idle speed is higher than expected.

The fault of idle speed control exceeding the specified value is because the throttle is too dirty, and the computer corrects the throttle opening in real time. When the throttle is dirty and blocked to a certain extent and reaches the limit, the computer will report this fault code, so it is necessary to clean the throttle and check whether the intake pipe leaks.

When the idle speed of automobile engine is lower than or exceeds the specified range, there will be phenomena such as staged flameout and unstable speed. Idle instability is characterized by engine jitter and uneven speed during idle operation, which is caused by blockage of idle air holes, poor work of idle devices, weak spark of spark plugs in individual cylinders, lax sealing of individual valves, air leakage in intake manifold, early or late ignition time, improper idle adjustment, etc.

If the speed is unstable, adjust the idle speed first. If the fault cannot be eliminated after adjustment, check whether the idle metering hole and idle air metering hole are blocked. If the metering hole is blocked, it can be cleaned with gasoline or acetone and blown clean with compressed air. If the metering hole is not blocked, the engine speed should be stabilized at a certain speed, and whether the lower gasket in the intake manifold or carburetor leaks air. If air leakage occurs, it can be eliminated by tightening screws or increasing or decreasing gaskets.