Symptom Checks
WARNING: This page is about a different car, the 1995 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Perform the following:
- Perform QUICK TEST. See TESTS W/CODES - EEC-IV (4.0L) article. If code is present, perform appropriate CIRCUIT TEST.
- Check power to MAP/BARO sensor. See step 3) of CIRCUIT TEST S in TESTS W/CODES - EEC-IV (4.0L) article.
- Check ignition system. See IGNITION SYSTEMS in appropriate SYSTEM/COMPONENT TESTS - EEC-IV (4.0L) article.
- Check fuel delivery system. See FUEL SYSTEM in appropriate SYSTEM/COMPONENT TESTS - EEC-IV (4.0L) article.
- Check for restricted exhaust system.
- Ensure engine operates at normal operating temperature.
- Check air intake system. Ensure throttle plate and linkages operate properly.
- Check engine mechanical condition. Check compression, camshaft, valve train components, etc.
- Ensure transmission is functioning properly.
- Check for binding/dragging brakes.
- Ensure A/C turns off during Wide Open Throttle (WOT).
- Check customer driving habits.