Inspection Procedure

1. Refer to appropriate service information and visually and/or physically inspect following conditions;
   • Vacuum hoses for splits, kinks and improper connections.
   • Throttle body gasket.
   • Gasket between intake manifold and cylinder head.
   • Seals between intake manifold and fuel injectors.
   • Exhaust system between O2 sensor and the three way catalyst for air leakage.
   • Air cleaner filter element for excessive dirt or for any foreign objects.
   • Throttle body inlet for damage or for any foreign objects.
   • Throttle bore and throttle plate for chocking and for any foreign objects.
   • Restricted exhaust system.

Good 

• Carefully re-do this troubleshooting guide steps.
• If the diagnostics have been performed correctly with no failure found and no problems were found with the circuits or connectors, replace the PCM and then go to "Verification of Repair " procedure.

No Good 

• Repair as necessary and than go to "Verification of Repair " procedure.