Symptom Checks

Check the following items:

• Check idle speed. See IDLE SPEED in ADJUSTMENTS - 2.0L article.
• 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.
• Check air intake system. See CIRCUIT TEST HU.
• Check exhaust system. See CIRCUIT TEST HF.
• Check engine compression. Check engine mechanical condition. Check intake manifold gasket, camshaft and valves.
• Ensure engine operates at normal operating temperature.
• Check EGR system.
• Check engine compression. Check engine mechanical condition. Check intake manifold gasket, camshaft and valves.