Symptom Checks

Check the following items:

• Perform QUICK TEST and check for codes. See the TESTS W/CODES - EEC-IV article. If fault codes are present, perform appropriate CIRCUIT TEST.
• Check Idle Air Control (IAC). See step 1) of CIRCUIT TEST S in the TESTS W/CODES - EEC-IV article.
• Check idle speed. See IDLE SPEED in the ADJUSTMENTS article.
• Check ignition system. See IGNITION SYSTEMS in the SYSTEM/COMPONENT TESTS article.
• If engine stalls during parking maneuvers, check Power Steering Pressure (PSP) switch operation. See step 3) of CIRCUIT TEST FF in the TESTS W/CODES - EEC-IV article.
• If engine stalls with A/C on, check A/C input circuit. See step 30) of CIRCUIT TEST KM in the TESTS W/CODES - EEC-IV article.
• If engine stalls during transmission engagement, check transmission solenoids. Go to CIRCUIT TEST TC in the TESTS W/CODES - EEC-IV article.
• Check for restricted exhaust system.
• Check for restricted air intake duct.
• Check EGR system. See the SYSTEM/COMPONENT TESTS article.
• Check engine compression. Check engine mechanical condition. Check camshaft and valve train components.
• Ensure transmission is functioning properly.