Fuel Charging and Controls

The fuel injection supply manifold:

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

The throttle body:

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

The fuel injector:

• 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. Do not clean.

The fuel pressure relief valve:

• is used to inspect and relieve fuel pressure.

Fuel Charging and Controls

Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.