Clean the oxygen sensor due to unstable idle speed.

Hello! The reasons for the unstable idle speed of the engine are: 1, and the idle switch is not turned off; 2, idle speed control valve (ISC) failure; 3. The air inlet pipe leaks; 4. Wrong gas distribution phase; 5. The fuel injector leaks or is blocked; 6, exhaust system failure; 7, water temperature sensor failure. The elimination methods of engine idling instability are: 1, adjustment, repair or replacement of throttle position sensor; 2. Clean or replace the idle speed control valve, and use a special decoder to basically set the idle speed; 3. Find the air inlet pipe leakage, reseal or replace parts; 4. Check the timing mark and readjust the valve timing according to the standard; 5. Clean the injectors, check the fuel injection quantity of each injector, and make sure there is no blockage or leakage; 6. Check the exhaust system with a vacuum gauge. If Px is low and acceleration is often accompanied by tension, it can be determined as the fault. I hope I can help you.