Ford F150 Pickup. Manual — 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