Fuel System Pressure Release (Fuel Line Venting)
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.
NOTE:
To perform fuel system pressure release, use Fuel Rail Test & Venting Kit (134-00116), Grounding Cable (134-00121) and Venting Hose (134-00118). 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.
- Insert grounding spike into earth. Connect grounding cable between grounding spike and fuel injection supply manifold. See Fig 1.
- Turn manual lockdown valve jackscrew on each fuel tank solenoid valve. See Fig 2. Connect fuel rail test and vent kit hose to Schrader valve on fuel rail. Ensure valve on tester is closed. Connect Venting Hose (134-00118) to Fuel Pressure Test & Venting Kit (134-00121) manifold.
- Remove fuel pump relay from power distribution box. Construct a jumper wire approximately 6" long with spade terminals on each end. Jump fuel pump relay terminals. See Fig 3.
- Slowly open bleed valve on fuel pressure vent and test kit manifold and allow fuel to vent to atmosphere for one minute. Close bleed valve and remove pressure test and venting kit from vehicle.