Fuel Charging and Controls

FUEL CHARGING AND CONTROLS

The fuel charging and controls system consists of the:
- throttle body (TB).
- fuel charging wiring.
- fuel rail.
- fuel injector.
- fuel pump relay.

The fuel charging and controls system is:
- a sequential multiport fuel injection (SFI) system.
- pulse-width modulated.
- mass air flow controlled.

The fuel rail:
- delivers fuel to the individual fuel injectors.
- receives fuel from the fuel supply tube.

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

The fuel injectors:
- are electrically operated by the powertrain control module (PCM).
- have an internal solenoid which opens a needle valve to inject fuel into the lower intake manifold.
- atomize the fuel as the fuel is delivered.
- are deposit-resistant.