Ford F150 Pickup. Instruction - part 1158

Fig. 25: Connecting Venting Hose Assembly To Vent Stack 
Courtesy of FORD MOTOR CO. 

10. Remove the fuel pump relay from the power distribution box.  

11. Construct a jumper wire from 152 mm (6 inches) of 18 gauge wire and two spade terminal ends.  

12. Jumper the fuel pump relay circuit from Socket 87 to Socket 30. 

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - Natural Gas - F150 Pickup

  

Fig. 26: Jumpering Fuel Pump Relay Circuit 
Courtesy of FORD MOTOR CO. 

13. Slowly open the instruction lockdown valve jackscrew on the fuel tank solenoid valve of the fuel tank to be 

vented.  

14. 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".  

15. Slowly open the bleed valve on the venting kit and allow the contents of the fuel tank to vent to the 

atmosphere. Venting can take in excess of one hour.  

16. Close the bleed valve on the venting kit, and observe the gauge pressure. The pressure should be at or 

near 0 kPa (0 psi).  

17. Repeat the procedure until all affected tanks are vented.  

18. Install the fuel fill line onto the fuel fill valve. 

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - Natural Gas - F150 Pickup

  

Fig. 27: Installing Fuel Fill Line Onto Fuel Fill Valve 
Courtesy of FORD MOTOR CO. 

Solenoid - Stuck Open 

NOTE:

On vehicles equipped with an extended range fuel tank, the jackscrew can 
be reached through an access hole in the vapor retaining cover.

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - Natural Gas - F150 Pickup

  

Fig. 28: Identifying Instruction Lockdown Valve Jackscrew 
Courtesy of FORD MOTOR CO. 

1. Turn in the instruction lockdown valve jackscrew on the fuel tank solenoid valve(s).  

2. Perform the fuel line venting procedure. For additional information, refer to FUEL LINE 

EVACUATION .  

3. Disconnect the fuel fill line from the fuel fill valve. 

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - Natural Gas - F150 Pickup