Cuts Out, Misses
- Disconnect IAC motor. Start engine. Using insulated pliers, remove one spark plug at a time and note RPM. If RPM drops within 50 RPM on all cylinders, proceed to ROUGH, UNSTABLE IDLE symptom in this article.
- Check ignition system and cylinder compression if no RPM change was noted or exceeded 50 RPM. Repair as necessary.
- Disconnect all injector wiring connectors. Install Injector Test Light (J034730-2) between connector terminals. Note light while cranking. Test light should blink during cranking. Check injector drive circuit if light fails to blink.
- Check for restricted fuel filter or fuel contamination. Check fuel pressure. See appropriate A-7 FUEL SYSTEM DIAGNOSIS CHART in COMPUTERIZED ENGINE CONTROL section.
- Perform injector balance. See appropriate C-2A INJECTOR BALANCE TEST in COMPUTERIZED ENGINE CONTROL section. Check ignition system. Check for worn or damaged engine components.