Symptom Checks

Check the following items:

• Check air intake system. Also, ensure throttle plate and linkages operate properly.
• Check EGR system.
• Ensure Idle Air Control (IAC) solenoid controls idle speed. If IAC solenoid does not control idle speed, check IAC valve assembly. See CIRCUIT TEST KE.
• Check PCV system. See CIRCUIT TEST HG.
• Check PCV system. See CIRCUIT TEST HG.
• Check ignition system. See CIRCUIT TEST JD.
• Check fuel delivery system. See CIRCUIT TEST HC.
• Check Evaporative Emission (EVAP) system. See CIRCUIT TEST HV.
• Check exhaust system for restriction. See CIRCUIT TEST HF.
• Ensure transmission is functioning properly. If engine stalls during transmission engagement, check transmission solenoids. Go to CIRCUIT TEST TC.
• Check engine compression. Check engine mechanical condition. Check valve timing.