Fuel Delivery System

Fuel Supply Components
The electric fuel pump is located in the fuel tank with the gage sending unit. An electric fuel pump pumps the fuel through an in-line fuel filter to the lower manifold assembly fuel passage. The pump provides fuel at a pressure greater than is needed by the injectors.

The pressure regulator keeps fuel available to the fuel injectors at a regulated pressure. The pressure regulator is attached to the end of the lower manifold assembly.

Fuel, in excess of the injector needs, is returned to the fuel tank by a separate return line.

Caution: In order to prevent damage and corrosion to the fuel system, do not use any fuels which contain methanol.

The fuel supply is stored in the fuel tank. An electric fuel pump, which is located in the fuel tank with the fuel level sensor sending unit, pumps fuel through an in-line fuel filter to the engine. The pump provides fuel at a pressure greater than is needed by the injectors. The fuel pressure regulator keeps fuel available to the injectors at a regulated pressure. The unused fuel is returned to the fuel tank by a separate line.

Fuel Metering System Components

Fuel System Operation

The SFI system consists of the following parts:

- The fuel supply system (fuel tank, pump, pipes).
- The fuel pump electrical circuit.
- Intake manifold assembly, including the following items:

- The lower manifold assembly, including the following items:

- The SFI fuel injectors.
- The fuel pressure regulator assembly.

- The upper manifold assembly, including the following items:

- The throttle valve.
- The Idle Air Control (IAC) valve.
- The Throttle Position (TP) sensor.