Ford F150 Pickup. Instruction - part 1127

Fig. 1: Identifying Fuel System Components 
Courtesy of FORD MOTOR CO. 

FUEL SYSTEM 

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - F150 Pickup

  

The vehicle:  

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is equipped with a Multiport Fuel Injection (MFI) system.  

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has separately controlled fuel injectors (9F593) mounted to the intake manifold for each cylinder.  

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fuel injectors are supplied with pressurized fuel from the fuel pump (9350) through the fuel injection 
supply manifold (9D280).  

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fuel injection supply manifold is equipped with a fuel pressure regulator (9C968).  

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fuel pressure regulator controls the pressure going to the fuel injectors.  

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has excess fuel to the fuel injectors returned to the fuel tank (9002).  

FUEL SYSTEM - LIGHTNING 

The vehicle:  

z

is equipped with a Multiport Fuel Injection (MFI) system.  

z

has separately controlled fuel injectors (9F593) mounted to the intake manifold for each cylinder.  

z

fuel injectors are supplied with pressurized fuel from the fuel pump (9350) through the fuel injection 
supply manifold (9D280).  

z

fuel injection supply manifold is equipped with a fuel pressure regulator (9C968) which controls the 
pressure going to the fuel injectors.  

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has excess fuel to the fuel injectors returned to the fuel tank (9002).  

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requires premium unleaded fuel.  

DIAGNOSIS & TESTING 

FUEL SYSTEM 

Refer to appropriate SELF-DIAGNOSTICS article . 

GENERAL PROCEDURES 

SPECIAL TOOL(S) 

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - F150 Pickup

  

Fig. 2: Identifying Special Tool(s) 
Courtesy of FORD MOTOR CO. 

PRESSURE RELIEF 

1. Remove the Schrader valve cap and install the Fuel Pressure Gauge. 

WARNING:

Do not smoke or carry lighted tobacco or open flame of any type when 
working on or near any fuel-related component. Highly flammable 
mixtures are always present and may be ignited, resulting in possible 
personal injury.

WARNING:

Fuel in the fuel system remains under high pressure even when the 
engine is not running. Before servicing or disconnecting any of the fuel 
lines or fuel system components, the fuel system pressure must be 
relieved to prevent accidental spraying of fuel, causing personal injury or 
a fire hazard.

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - F150 Pickup

  

Fig. 3: Locating Schrader Valve Cap 
Courtesy of FORD MOTOR CO. 

2. Open the instruction valve slowly on the Fuel Pressure Gauge and relieve the fuel pressure. 

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This will drain some fuel out of the system. Place the fuel in a suitable container.  

 

2003 Ford Pickup F150 

2003 GENERAL INFORMATION Fuel System - General Information - F150 Pickup