Fuel Charging and Controls

FUEL CHARGING AND CONTROLS

The fuel charging and control system consists of the:
- electronic throttle body.
- throttle body spacer.
- fuel injectors.
- fuel rail.
- fuel rail pressure and temperature sensor.

The fuel charging and control 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 throttle body:
- controls air supply to the upper intake manifold by positioning the throttle plate.
- is not adjustable.
- cannot be cleaned.

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

The fuel pump driver module (FPDM) engages the fuel pump when energized by the PCM.

The fuel rail pressure and temperature sensor:
- measures the fuel temperature.
- maintains constant fuel pressure throughout the fuel system and to the fuel injectors.
- is spring-loaded and operated by intake manifold vacuum.