Check Intake/Exhaust System For Restriction Or Leakage

Visually/physically inspect the air leakage in intake/exhaust system for the following areas:
- 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
Visually/physically inspect the restriction in intake/exhaust system for the following areas:
- 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
Was a problem found in any of the above areas?
YES
- Replace or repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
NO
- Go to 4
Inspect the leakage in EVAP. system for the following conditions:
1. Check the EVAP canister for fuel saturation. If the EVAP canister is full of fuel, visually and physically inspect the EVAP and fuel system. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  If OK, go to next step.
2. Remove the manifold side vacuum hose from the EVAP canister purge valve.
3. Using a hand vacuum pump apply specified vacuum (Approx. 15 in, Hg) to the manifold side of the valve
4. Does the valve hold vacuum?
  YES
  - Go to SENSOR INSPECTION
  NO
  - Repair air leakage and go to "VERIFICATION OF VEHICLE REPAIR " procedure