For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
System Testing
Warning: Place a dry chemical (Class B) fire extinguisher near the area before performing a Fuel Tank Leak Check. Before removing the fuel tank for a suspected leak, make sure that the fuel pipes or the tubes are not leaking onto the tank. Once removed, make sure that the fuel is not leaking around the fuel sender O-ring. Failure to follow these precautions may result in personal injury.
- Remove the fuel tank. Refer to Fuel Tank Replacement.
- Remove the EVAP canister. Refer to Evaporative Emission Canister Replacement.
- Plug the fuel feed pipe and the EVAP pipes on the fuel tank.
- Plug the fuel filler neck opening.
- Submerge the fuel tank in water or apply a soapy solution to the outside of the tank.
- Apply 7-15 kPa (1-2 psi) air pressure to the fuel tank vent pipe.
- Air bubbles appearing from the fuel tank indicate a leak.
- Replace the fuel tank if the tank is leaking.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
