Ford F150 Pickup. Instruction - part 1185

Fig. 19: Removing Coalescer Filter 
Courtesy of FORD MOTOR CO. 

6. To install, reverse the removal procedure.  

FUEL PRESSURE REGULATOR - NATURAL GAS 

Removal and Installation 

NOTE:

All fuel lines must be leak tested. Refer to LEAK TEST -- BI-FUEL 
SYSTEM .

WARNING:

Do not modify the system configuration or components or replace 
components with components no specifically designed for use with 
natural gas. Ford Motor Company has specifically designed the materials, 
components and system configuration for the 5.4L F-Series Bi-Fuel 
vehicle, and each particular system is precisely calibrated for efficient 
operation. The use of different parts or materials can produce an untested 
configuration that can result in fire or personal injury or cause engine 
damage.

 

2003 Ford Pickup F150 

2003 ENGINE Fuel Tank And Lines-Bi-Fuel - F150 Pickup

  

1. Relieve the natural gas fuel system pressure. Refer to PRESSURE RELIEF -- NATURAL GAS BI-

FUEL SYSTEM .  

2. Disconnect the battery ground cable.  

3. Drain the engine cooling system. Refer to DRAINING .  

4. Disconnect the pressure relief vent hose. 

WARNING:

It is important that your bi-fuel vehicle be properly maintained by Ford bi-
fuel trained personnel. If a concern occurs, it is important that properly 
trained personnel diagnose the cause. If a concern relates to the fuel 
system, correct part replacement is imperative to keep your vehicle 
operating at normal performance. Bi-fuel components and gasoline 
specific components are not interchangeable. If your vehicle is not 
serviced in accordance with bi-fuel service procedures, damage can 
occur and your warranty may be invalidated.

WARNING:

Fuel supply lines are always pressurized. When servicing fuel related 
components, do not smoke or carry lighted tobacco or an open flame of 
any type. Flammable mixtures may be present and can ignite, resulting in 
personal injury.

WARNING:

The natural gas fuel system is always pressurized to 655 kPa (95 psi) 
downstream of the fuel pressure regulator and up to 24821 kPa (3600 psi) 
upstream of the fuel pressure regulator. Use care when servicing the fuel 
system or personal injury can occur.

WARNING:

The natural gas fuel supply manifold is pressurized to 655 kPa (95 psi). 
Fuel pressure must be relieved prior to any fuel system service.

WARNING:

The fuel system pressure must be relieved before any component can be 
removed. The fuel tanks must be evacuated prior to tank removal. 
Removal of components without pressure relief or tank evacuation can 
cause propane fuel to escape into the air and cause injury or death.

 

2003 Ford Pickup F150 

2003 ENGINE Fuel Tank And Lines-Bi-Fuel - F150 Pickup

  

Fig. 20: Disconnecting Pressure Relief Vent Hose 
Courtesy of FORD MOTOR CO. 

CAUTION: Do not reuse the copper washers; reuse may cause reduced sealing 

effectiveness and natural gas leaks.

NOTE:

Use only new natural gas approved O-ring seals upon installation.

NOTE:

Lubricate the O-ring seals with Super Premium SAE 5W30 Motor Oil or 
equivalent meeting Ford specification WSS-M2C153-G.

 

2003 Ford Pickup F150 

2003 ENGINE Fuel Tank And Lines-Bi-Fuel - F150 Pickup

  

Fig. 21: Disconnecting Fuel Lines 
Courtesy of FORD MOTOR CO. 

5. Disconnect the fuel lines.  

6. Disconnect the connector. 

 

2003 Ford Pickup F150 

2003 ENGINE Fuel Tank And Lines-Bi-Fuel - F150 Pickup