Symptom Checks

Perform the following:

• Perform QUICK TEST. See TESTS W/CODES - EEC-IV (4.0L) article. If code is present, perform appropriate CIRCUIT TEST.
• On models with Distributor Ignition (DI), perform CIRCUIT TEST AA. On 4.0L engine, perform CIRCUIT TEST AC. See TESTS W/CODES - EEC-IV (4.0L) article.
• Check for restricted exhaust system.
• Check engine mechanical condition. Check compression, camshaft, valve train components, etc.