System Inspection

1. 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 ECM/PCM and then go to "Verification of Vehicle Repair " procedure.

No Good 

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