Symptom Checks
WARNING: This page is about a different car, the 1995 Ford RV Cutaway, 1995 Ford Econoline, 1995 Ford Cutaway, and 1995 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.
Perform the following:
- Perform QUICK TEST. See appropriate TESTS W/CODES - EEC -IV article below. If code is present, perform appropriate CIRCUIT TEST.
- Check power to MAP/BARO sensor. See step 3) of CIRCUIT TEST S in appropriate TESTS W/CODES - EEC-IV article below.
- TESTS W/CODES - EEC-IV (4.9L)
- TESTS W/CODES - EEC-IV (5.0L)
- TESTS W/CODES - EEC-IV (5.8L)
- TESTS W/CODES - EEC-IV (7.5L)
- Check ignition system. See IGNITION SYSTEMS in appropriate appropriate I - SYSTEM & COMPONENT TESTING article below.
- Check idle speed. See IDLE SPEED & MIXTURE in appropriate ADJUSTMENTS article.
- ADJUSTMENTS - 4.9L
- ADJUSTMENTS - 5.0L
- ADJUSTMENTS - 5.8L
- ADJUSTMENTS - 7.3L DIESEL
- ADJUSTMENTS - 7.5L
- Check Positive Crankcase Ventilation (PCV) system. See EMISSION SYSTEMS & SUB-SYSTEMS in the appropriate appropriate I - SYSTEM & COMPONENT TESTING article below.
- SYSTEM/COMPONENT TESTS - EEC-IV (4.9L)
- SYSTEM/COMPONENT TESTS - EEC-IV (5.0L)
- SYSTEM/COMPONENT TESTS - EEC-IV (5.8L)
- SYSTEM/COMPONENT TESTS - EEC-IV (7.3L DIESEL)
- SYSTEM/COMPONENT TESTS - EEC-IV (7.5L)
- Ensure driveline and transmission are functioning properly.
- Check air intake system. Ensure throttle plate and linkages operate properly.
- Check fuel delivery system. See FUEL SYSTEM in appropriate appropriate I - SYSTEM & COMPONENT TESTING article below.
- Check for restricted exhaust system.
- Check EGR system. See EMISSION SYSTEMS & SUB-SYSTEMS in appropriate I - SYSTEM & COMPONENT TESTING article below.
- Check Fuel Evaporation (EVAP) system. See EMISSION SYSTEMS & SUB-SYSTEMS in appropriate I - SYSTEM & COMPONENT TESTING article below.
- SYSTEM/COMPONENT TESTS - EEC-IV (4.9L)
- SYSTEM/COMPONENT TESTS - EEC-IV (5.0L)
- SYSTEM/COMPONENT TESTS - EEC-IV (5.8L)
- SYSTEM/COMPONENT TESTS - EEC-IV (7.3L DIESEL)
- SYSTEM/COMPONENT TESTS - EEC-IV (7.5L)
- Check engine mechanical condition. Check compression, camshaft, valve train components, etc.
- Check Heated Oxygen Sensor (HO2S) heater. Go to step 21) of CIRCUIT TEST H in appropriate TESTS W/CODES - EEC-IV article below.
- TESTS W/CODES - EEC-IV (4.9L)
- TESTS W/CODES - EEC-IV (5.0L)
- TESTS W/CODES - EEC-IV (5.8L)
- TESTS W/CODES - EEC-IV (7.5L)
- Check cooling system (radiator, thermostat, etc.)
- Check customer driving habits (over RPM/speed limiting function enabled).