What are the reasons for unstable idle speed in the Haval H9?

[AllisonLee]

Reasons for unstable idle speed in the Haval H9: 1. Dirty throttle body or excessive carbon buildup in the fuel injectors. The solution is to clean the fuel system and check if the idle speed control valve has carbon deposits, which should be cleaned if necessary; 2. Issues with the ignition system. The solution is to check if the spark plugs have excessive carbon buildup and replace them if needed; 3. Unstable fuel pressure. The solution is to check the fuel pressure and replace components if necessary; 4. Aging engine components. The solution is to replace the components. Idle speed refers to a working condition when the engine is running without load. When the accelerator pedal is completely released while the engine is running, the engine enters idle speed. When adjusting the idle speed, the RPM should not fluctuate abruptly, as this can cause premature wear to the engine.