Inspection Procedure
- 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 and then go to "Verification of Repair " procedure.
No Good
- Repair as necessary and go to "Verification of Repair " procedure.