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.

z

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

z

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