Fuel Tank Leak Test

IMPORTANT: Before attempting the Fuel Tank Leak Check place a dry chemical (Class B) fire extinguisher near the work area.

1. Install the J41415-40 fill tank cap adaptor.
2. Connect the J41413 [1][2]EVAP pressure/purge diagnostic station to the fill tank cap adaptor.
3. With a scan tool, seal the EVAP system.
4. Raise the vehicle on a hoist. Refer to Vehicle Lifting Caution.
5. With the [1][2]EVAP diagnostic station, maintain 15 in. H2O (3.75 kpa) within the fuel tank.

IMPORTANT: It may be necessary to partially lower the fuel tank to inspect the top of the fuel tank and fuel sender assembly O-ring. Refer to Fuel Tank Replacement.

6. With the J41416 ultrasonic leak detector, test for leaks in the fuel tank and [1][2]EVAP pipes.
7. Visually inspect for fuel leaking from the fuel tank.
8. If a leak is detected refer to the following component replacements:
^ Fuel tank leak-refer to Fuel Tank Replacement.
^ Fuel sender O-ring or fuel sender leak-refer to Fuel Sender Assembly Replacement.
^ Fuel or [1][2]EVAP pipe leak-refer to Fuel Hose/Pipes Replacement (Filter to Tank).