Fuel Line Venting

Special Tools Desired

WARNING:
- THE FUEL SUPPLY LINES WILL REMAIN PRESSURIZED AFTER ENGINE SHUTDOWN. WHEN SERVICING FUEL-RELATED COMPONENTS, DO NOT SMOKE OR CARRY LIGHTED TOBACCO OR ANY OPEN FLAME OF ANY TYPE. FLAMMABLE GASES MAY BE PRESENT AND IGNITE, RESULTING IN POSSIBLE PERSONAL INJURY.
- DO NOT MODIFY THE SYSTEM CONFIGURATION OR COMPONENTS, OR REPLACE COMPONENTS WITH PARTS NOT SPECIALLY DESIGNED FOR USE WITH NATURAL GAS. FORD MOTOR COMPANY HAS SPECIALLY DESIGNED THE MATERIALS, COMPONENTS, AND SYSTEM CONFIGURATION FOR THE 5.4L F-250 NATURAL GAS VEHICLES, AND EACH PARTICULAR SYSTEM IS PRECISELY CALIBRATED FOR EFFICIENT OPERATION. THE USE OF DIFFERENT PARTS OR MATERIALS CAN PRODUCE AN UNTESTED CONFIGURATION THAT COULD RESULT IN FIRE OR PERSONAL INJURY, OR CAUSE ENGINE DAMAGE.
- FUEL LINE VENTING IS REQUIRED PRIOR TO FUEL SYSTEM COMPONENT SERVICE.
- EYE AND EAR PROTECTION ARE REQUIRED TO BE WORN DURING VENTING OR REMOVAL AND INSTALLATION OF FUEL SYSTEM COMPONENTS.
- THE STATUS (STUCK OPEN, STACK CLOSED, DOES NOT OPERATE OR GOOD) OF EACH FUEL TANK SOLENOID VALVE MUST BE IDENTIFIED PRIOR TO VENTING THE FUEL TANKS.

NOTE:
- It is recommended that venting be performed with a vent stack. Any vent stack installation must be approved by local authorities.
- The following procedures are required to be used when venting fuel from the fuel lines to remove the fuel tanks, the fuel lines, the coalescer/filter assembly, the fuel pressure regulator, the fuel injection supply manifold, the fuel injectors, the fuel pressure relief valve, the fuel shutoff valve solenoid, the injection pressure sensor or the engine fuel temperature sensor.







1. Connect the grounding cable to the fuel injection supply manifold.







2. Connect the grounding cable to the ground rod.







3. Turn in the manual lockdown valve jackscrew on the fuel tank solenoid valve(s).







4. Connect the fuel rail pressure test and venting kit to the fuel pressure relief valve on the fuel injection supply manifold.

NOTE: Make sure that the bleed valve on the fuel rail pressure test and venting kit is closed.







5. Connect the venting hose assembly to the fuel rail pressure test and venting kit.







6. Connect the venting hose assembly to the vent stack.
7. Remove the fuel pump relay from the power distribution box.
8. Construct a jumper wire from 152 mm (0.6 inches) of 18 gauge wire and two spade terminal ends.







9. Jumper the fuel pump relay circuit from Socket 87 to Socket 30.
10. Slowly open the bleed valve on the fuel rail pressure test and venting kit and allow the contents of the fuel lines to vent to atmosphere for 1 minute.
11. Close the bleed valve on the fuel rail pressure test and venting kit and remove from the vehicle.