Fuel Charging and Controls

The fuel injection supply manifold:
^ 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 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.