What are the troubleshooting methods for unstable car idling?
1 Answers
Car idling instability can be addressed through the following methods: 1. Check for air leaks in the intake pipe, PVC valve hose, and oil dipstick area. 2. Inspect whether the air filter element is excessively dirty. 3. Verify the proper functioning of the cold start injector and temperature-time control switch. 4. Check if the fuel system pressure is too low. 5. Examine the injector spray pattern. 6. Inspect cylinder compression and valve clearance. 7. Check the ECU (Engine Control Unit). 8. Replace electrical components. If the engine operates normally at medium to high speeds but exhibits unstable idling or even stalls at idle or near-idle speeds, this indicates an idling malfunction.