Fuel Tank: Testing and Inspection

CAUTION: 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 seal, a fuel till pipe, a fuel fill hose, fuel fill hose clamps 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
3. Drain the fuel tank. Refer to Fuel Tank Draining Procedure.
4. Remove the fuel tank.
5. Remove the EVAP vent valve.
6. Remove the EVAP canister.
7. Remove the fuel feed pipe (4), the fuel return pipe (2), and the fuel sender [1][2]EVAP pipe to fill limiter vent valve (3).
8. Plug the fuel feed pipe and the fuel return pipe on the fuel sender assembly.
9. Plug the fill limiter vent valve nipple (10).
10. Plug the over pressure relief valve hose (9).
11. Connect a piece of hose to the [1][2]EVAP pipe (3) on the fuel sender assembly.

NOTE: Do not submerge the fuel tank assembly in water in order to check for leaks in the fuel tank. Submerging the fuel tank in water may damage the electrical components mounted on the fuel tank.

12. Apply a soap solution to the outside of the fuel tank.
13. Apply 10 kPa (11/2 psi) air pressure to the piece of hose on the fuel sender [1][2]EVAP pipe. Air bubbles appearing from the fuel tank indicate a leak.
14. Replace the fuel tank if it is leaking.