Component Location

• delivers fuel to the fuel injector.
• receives fuel from the fuel supply line.

The throttle body:

• controls air supply to the upper intake manifold by positioning the throttle plate.
• connects the accelerator cable and, if equipped, the speed control actuator cable to the throttle plate.
• is not adjustable.
• cannot be cleaned.

The fuel injector:

• uses the replacement O -rings if needed.
• is electrically operated by the powertrain control module (PCM).
• has an internal solenoid that opens a needle valve to inject fuel into the lower intake manifold.
• atomizes the fuel as the fuel is delivered.
• is deposit-resistant.

The fuel pressure relief valve:

• is used to inspect and relieve fuel pressure.

The fuel pressure regulator:

• maintains a constant fuel pressure throughout the fuel system and to the fuel injector.
• is spring-loaded and operated by the intake manifold vacuum.