What to Do When the Car Idles Unsteadily?

[Ken]

Solutions for unsteady car idling: 1. Clean the throttle valve and intake tract; 2. Clean and inspect the fuel injectors; 3. Replace electrical components; 4. Check the fault points in the wiring harness; 5. Clean the grounding points; 6. Repair the engine's mechanical structure, etc. Causes of unsteady car idling: 1. Leakage in the intake manifold or various valves; 2. Excessive carbon buildup in the throttle valve and intake tract; 3. Faulty idle air actuator; 4. Inaccurate intake air volume; 5. Fuel injector malfunction; 6. Fuel pressure issues; 7. Inaccurate fuel injection volume; 8. Problems with the ignition module and ignition coil; 9. Issues with spark plugs and high-voltage wires; 10. Inaccurate ignition timing; 11. Blocked three-way catalytic converter.