Ford F150 Pickup. Instruction - part 1332

Courtesy of FORD MOTOR CO. 

Fig. 24: Removing Fuel Pressure Regulator Fuel Lines 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - CNG

  

Fig. 25: Locating Fuel Pressure Regulator-To-Coalescer/Filter 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - CNG

  

Fig. 26: Locating Fuel Pressure Regulator Mounting Bolts 
Courtesy of FORD MOTOR CO. 

FUEL PRESSURE RELIEF VALVE 

Release fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Remove air cleaner assembly 
and tubes. Remove fuel pressure relief valve cap. Remove fuel pressure relief valve from fuel injection supply 
manifold. To install, reverse the removal procedure. Check for leaks. Perform COMPRESSED NATURAL 
GAS LEAK TEST under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - CNG article. 

FUEL RAILS & INJECTORS 

Removal & Installation 

1. Remove the engine air cleaner assembly and tubes. Release fuel system pressure. See FUEL SYSTEM 

PRESSURE RELEASE . Disconnect negative battery cable. Disconnect accelerator cable, accelerator 
return spring and speed control cable. Disconnect vacuum line from right side of throttle body spacer. 
Disconnect Idle Air Control (IAC) valve and Throttle Position (TP) sensor connectors. See Fig. 27 . 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - CNG

  

Disconnect power brake booster vacuum line. 

2. Remove throttle body and throttle body spacer. Disconnect injection pressure sensor and fuel temperature 

sensor electrical connectors. See Fig. 28 . Disconnect right radio capacitor and fuel shut off valve 
solenoid connectors. See Fig. 29 . Disconnect right fuel injector connectors. Remove right side fuel 
injection supply manifold retaining bolts. See Fig. 30 and Fig. 31 . Disconnect left fuel injector 
connectors. Disconnect left radio capacitor connector. See Fig. 32 . Remove left fuel injection supply 
manifold retaining bolts. See Fig. 33 . Disconnect fuel line. See FUEL LINE FITTINGS . Remove fuel 
injection supply manifold. Remove fuel injectors.  

3. Install NEW "O" rings with 5W-30 motor oil. To complete installation, reverse removal procedure. 

Ensure injectors and/or injector sleeves are properly seated. Tighten fuel rail bolts to specification. See 
TORQUE SPECIFICATIONS .  

4. After installation is completed, pressurize fuel system and inspect fuel lines and fittings for leaks. 

Perform COMPRESSED NATURAL GAS LEAK TEST under FUEL SYSTEMS in SYSTEM & 
COMPONENT TESTING - CNG article.  

Fig. 27: Locating IAC Valve & TP Sensor Connectors 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - CNG