Symptom Checks

Perform the following:

• Check ignition system. See IGNITION SYSTEMS in appropriate appropriate SYSTEM/COMPONENT TESTS article below.
• Perform QUICK TEST. See appropriate TESTS W/CODES - EEC -IV article below. If code is present, perform appropriate CIRCUIT TEST.
• TESTS W/CODES - EEC-IV (3.0L)
• TESTS W/CODES - EEC-IV (4.0L)
• Check air injection (if equipped). See EMISSION SYSTEMS & SUB-SYSTEMS in appropriate SYSTEM/COMPONENT TESTS article.
• Check engine mechanical condition. Check compression, intake manifold gasket, camshaft, valve train components, etc.
• Check fuel delivery system. See FUEL SYSTEM in appropriate appropriate SYSTEM/COMPONENT TESTS article below.
• SYSTEM/COMPONENT TESTS - EEC-IV (3.0L)
• SYSTEM/COMPONENT TESTS - EEC-IV (4.0L)