Fuel Charging and Controls

Fuel Charging and Controls

The fuel charging and control system consists of the following:

- Throttle Body (TB)
- Fuel injectors
- Fuel rail
- Fuel pressure relief valve

The fuel charging and controls system is:

- a Sequential Multi-Port 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 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.