Fuel Tank Solenoid Valve Functions Normally
NOTE:
Vehicle may have optional additional (rear) tank assembly in trunk.
- Release fuel pressure from lines. See COMPRESSED NATURAL GAS FUEL LINE VENTING . To vent fuel tank, ensure manual lockdown valve jackscrew on fuel tank is turned in.
- Connect grounding cable to fuel fill valve. See Fig 1 . Connect fuel filler neck venting kit to fuel filler valve. Connect hose between filler neck venting kit and vent stack that allows natural gas to be vented outside of repair shop. Vent stack must be approved by local authorities.
- Remove fuel pump relay from power distribution box. Construct a jumper wire approximately 6" long with spade terminals on each end. Connect jumper wire between fuel pump relay terminals.
- Slowly open manual lockdown jackscrew on fuel tank solenoid on tank to be vented. See Fig 2 . Slowly open manual backflow valve on fuel filler valve. Observe gauge pressure on fuel filler neck venting kit. Tank pressure should be indicated.
- Slowly open bleed valve on fuel filler neck venting kit and allow contents of fuel tank to vent to atmosphere. Venting could take in excess of one hour. When tank is exhausted, close bleed valve on fuel filler neck venting kit. Repeat procedure on all affected tanks.
- Release any residual pressure from fuel rail. See COMPRESSED NATURAL GAS FUEL LINE VENTING . If fuel tank solenoid does not operate (fuel is not releasing), see FUEL TANK VENTING (FUEL TANK SOLENOID VALVE STUCK OPEN) or FUEL TANK VENTING (FUEL TANK SOLENOID VALVE STUCK CLOSED OR INOPERATIVE) .
