Compressed Natural Gas Fuel Line Venting
WARNING: This page is about a different car, the 2002 Ford Econoline and 2002 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Fuel supply lines remain pressurized after engine shutdown. Ensure no open flame of any type is present. Flammable gases may be present and ignite, resulting in possible injury. Always release (vent) fuel pressure before disconnecting any fuel injection-related component downstream of fuel tank shutoff solenoids. DO NOT vent fuel system indoors. Manufacturer recommends venting fuel through a vent stack that allows natural gas to be vented outside of repair shop. Vent stack must be approved by local authorities.
NOTE:
To perform fuel system pressure release, use Fuel Rail Test and Venting Kit (134-00116), Grounding Cable (134-00121) and Venting Hose (134-00118).
- Insert grounding spike into earth. Connect grounding cable between grounding spike and fuel injection supply manifold.
- Turn manual lockdown valve jackscrew inward on each fuel tank solenoid valve. See Fig 1. Ensure bleed valve on fuel rail pressure tester and venting kit is closed. Connect Venting Hose (134-00118) to Schrader valve on fuel rail. Connect venting hose to Fuel Pressure Test And Venting Kit (134-00121) manifold.
- Connect venting hose to vent stack. Remove fuel pump relay from power distribution box. Construct a jumper wire approximately 6" long with spade terminals on each end. Connect jumper between fuel pump relay terminals No. 30 and 87. See Fig 2 and Fig 3 .
- Slowly open bleed valve on fuel pressure vent and fuel rail test kit manifold and allow fuel to vent through vent stack for one minute. Close bleed valve and remove fuel rail pressure test and venting kit from vehicle.