F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
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 (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 manual lockdown valve jackscrew on the fuel tank solenoid valve of the fuel tank to be vented.
11. Slowly open the manual backflow valve on the fuel filler valve.
12. Observe the gauge pressure of the fuel filler neck venting kit. The pressure should be at tank pressure if the fuel tank solenoid valve was identified
as functions normally.
13. Slowly open the bleed valve on the fuel filler neck venting kit and allow the contents of the fuel tank to vent to the atmosphere. Venting may take
in excess of 1 hour.
14. Close the bleed valve on the fuel filler neck venting kit, and observe the gauge pressure. The pressure should be at or near 0 kPa (0 psi).
15. Remove the fuel tank solenoid manual lockdown valve.
