Fuel Tank Leak Test
Fuel Tank Leak CheckCAUTION: 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.
IMPORTANT: This check requires a fuel sender assembly, a fuel sender gasket, a fuel tiller pipe and hose assembly, and a fuel filler cap to be installed in the fuel tank.
CAUTION: Refer to the Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure. Fuel Pressure Release
3. Drain the fuel tank. Refer to Fuel Tank Draining Procedure. Fuel Tank
4. Remove the fuel tank.
5. Remove the fuel feed, return, and EVAP pipes from the fuel sender and the fuel tank.
6. Reinstall the fuel tank filler pipe and hose.
7. Install the fuel filler cap.
8. Cap the fuel feed pipe and the fuel return pipe on the fuel sender assembly.
9. Connect a piece of hose to the EVAP pipe on the fuel sender assembly.
10. Apply a soap solution to the outside of the fuel tank.
11. Apply 7-10 kPa (1-11/2 psi) air pressure to the piece of hose on the fuel tank vent pipe. Air bubbles appearing from the fuel tank indicates a leak.
12. Replace the fuel tank if it is leaking.