F 250 2WD Pickup V8-5.4L CNG VIN M (1999)
8. Slowly open the manual backflow valve on the fuel filler valve.
9. 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 stuck open.
10. 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.
11. 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).
12. Remove the fuel tank solenoid manual lockdown valve.
13. Install the manual override tool into the fuel tank solenoid of the tank to the vented.
WARNING: MAKE SURE THE JACKSCREW IN THE MANUAL OVERRIDE TOOL IS RETRACTED FULLY
(COUNTERCLOCKWISE) PRIOR TO INSTALLATION INTO THE FUEL TANK SOLENOID VALVE. INSTALLATION OF THE
OVERRIDE TOOL IN THE VENTING POSITION WILL CAUSE NATURAL GAS TO BE IMMEDIATELY RELEASED.
