Check air leakage
- Visually/physically inspect the air leakage in intake/exhaust system for following Troubleshootings.
- 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 HO2S and three way catalyst for air leakage.
- Has a problem found in this procedure?
YES
- Repair relevant component (s) as necessary and then go to "Verification of Vehicle Repair "
NO
- Go to "Check the fuel line " as follows.