Ford F150 Pickup. Instruction — part 1270

Removal & Installation

Release CNG fuel system pressure. See COMPRESSED NATURAL GAS FUEL LINE VENTING under
FUEL SYSTEM PRESSURE RELEASE. Disconnect the fuel line. See Fig. 16 . Remove the nut and the fill
valve. See Fig. 27 . To install, reverse the removal procedure. Use only new natural gas approved "O" ring seals
upon installation. Lubricate the "O" ring seals with Super Premium SAE 5W-30 Motor Oil. After installation is
complete, fuel lines and fittings must be leak tested. See LEAK TEST - ALL BI-FUEL VEHICLES under
FUEL SYSTEMS in SYSTEM & COMPONENT TESTING - BI-FUEL - GASOLINE/CNG article. Fill and
bleed the cooling system.

Fig. 27: Locating Fuel Fill Valve Nut
Courtesy of FORD MOTOR CO.

FUEL PRESSURE REGULATOR

NOTE:

See FUEL SYSTEM PRECAUTIONS .

CAUTION: If CNG system is being disconnected for an extended period, cover all

open hose fittings and electrical connections to avoid contamination.

WARNING:

DO NOT reuse copper washers in low-pressure fittings, always use NEW
copper washers.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - Bi-Fuel - Gasoline/CNG

Removal & Installation

1. Release CNG fuel system pressure. See COMPRESSED NATURAL GAS FUEL LINE VENTING

under FUEL SYSTEM PRESSURE RELEASE. Disconnect negative battery cable. Drain engine cooling
system.

2. Disconnect pressure relief vent hose. See Fig. 28 . Disconnect fuel lines. See Fig. 29 . Disconnect

electrical connector and 2 coolant hoses from fuel pressure regulator. See Fig. 30 and Fig. 31 . Remove 2
bolts retaining fuel pressure regulator and remove fuel pressure regulator. See Fig. 32 . To install, reverse
removal procedure. After installation is complete, fuel lines and fittings must be leak tested. See LEAK
TEST - ALL BI-FUEL VEHICLES under FUEL SYSTEMS in SYSTEM & COMPONENT TESTING
- BI-FUEL - GASOLINE/CNG article. Fill and bleed the cooling system.

Fig. 28: Locating Fuel Pressure Regulator Pressure Relief Hose

NOTE:

Coolant lines may be attached to either coolant fitting of fuel pressure
regulator. There is no preferred coolant flow direction. Ensure all coolant hoses
DO NOT come in contact with engine mount bolts or other components. When
vehicle battery is disconnected and reconnected, some abnormal drive
symptoms may occur until vehicle relearns adaptive strategy.

NOTE:

On installation, use NEW "O" rings. Lubricate NEW "O" rings with 5W-30 motor
oil.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - Bi-Fuel - Gasoline/CNG

Courtesy of FORD MOTOR CO.

Fig. 29: Locating Fuel Pressure Regulator Fuel Lines
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - Bi-Fuel - Gasoline/CNG

Fig. 30: Locating Fuel Pressure Regulator Electrical Connector
Courtesy of FORD MOTOR CO.

2003 Ford Pickup F150

2003 ENGINE PERFORMANCE Removal & Installation - F150 Pickup - Bi-Fuel - Gasoline/CNG