Air Leakage Inspection

Visually/physically inspect the air leakage in intake/exhaust system as following items,
If OK, go to next step.

If NG, repair as necessary and go to VERIFICATION OF VEHICLE REPAIR procedure.
1. Vacuum hoses for splits, kinks and improper connections.
2. Throttle body gasket
3. Gasket between intake manifold and cylinder head
4. Seals between intake manifold and fuel injectors
5. Exhaust system between HO2S and Three way catalyst for air leakage
Check for air leakage in EVAP. Purge control valve
1. Remove the manifold side vacuum hose from the EVAP canister purge valve.
2. Using a hand vacuum pump apply specified vacuum(Approx. 15 in, Hg) to the manifold side of the valve.
3. Does the valve hold vacuum?
YES
- Go to FUEL SYSTEM INSPECTION procedure.
NO
- Repair air leakage and go to VERIFICATION OF VEHICLE REPAIR procedure.