Ford F150 Pickup. Instruction - part 1152

Fig. 3: View Of Coalescer/Filter Assembly 
Courtesy of FORD MOTOR CO. 

Typical Vent Stack Installation 

Refer to the following illustration for a typical vent stack installation.

 

2003 Ford Pickup F150 

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

  

Fig. 4: Typical Vent Stack 
Courtesy of FORD MOTOR CO. 

DIAGNOSIS & TESTING 

 

2003 Ford Pickup F150 

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

  

FUEL SYSTEM 

Refer to appropriate SELF-DIAGNOSTICS article . 

GENERAL PROCEDURES 

DRAINING - COALESCER/FILTER 

1. Perform the fuel line venting procedure; refer to FUEL LINE EVACUATION .  

2. Place a container under the coalescer/filter assembly. 

NOTE:

Hold the coalescer body with a wrench on the flats, to prevent loosening 
of the filter housing.

 

2003 Ford Pickup F150 

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

  

Fig. 5: Locating Coalescer/Filter Assembly Drain Plug
Courtesy of FORD MOTOR CO. 

3. Slowly loosen the coalescer/filter assembly drain plug, to vent the system of any residual fuel pressure.  

4. Remove the coalescer/filter assembly drain plug and allow all liquid to drain.  

5. Install the coalescer/filter assembly drain plug and tighten to specifications. 

Fig. 6: Installing Coalescer/Filter Assembly Drain Plug 
Courtesy of FORD MOTOR CO. 

6. Perform the fuel system leak test procedure; refer to FUEL SYSTEM LEAK TEST .  

SPRING LOCK COUPLINGS 

Special Tool(s) 

 

2003 Ford Pickup F150 

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