Fuel Charging and Controls

FUEL CHARGING AND CONTROLS

The fuel charging and control system consists of the:
- throttle body (TB).
- fuel injectors.
- fuel rail.
- fuel pressure relief valve.

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

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

The throttle body (TB):
- 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.

The fuel injectors:
- are electrically operated by the PCM.
- atomize the fuel as the fuel is delivered.
- are deposit-resistant and self-cleaning.
- each have an internal solenoid which opens a needle valve to inject fuel into the cylinder heads.

The fuel pressure relief valve is used to inspect and relieve fuel pressure.