Fuel Charging and Controls

FUEL CHARGING AND CONTROLS


The fuel charging and control system consists of the:
- throttle body.
- fuel injectors.
- fuel charging wiring.
- fuel injection supply manifold.
- fuel rail pressure (FPR) sensor.
- fuel pump relay.

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 relay engages the fuel pump when energized by the powertrain control module.

The fuel charging wiring is a single harness that also includes electrical connectors for monitoring all engine functions.