Fuel Charging and Controls

FUEL CHARGING AND CONTROLS

The fuel charging and control system consists of the:
- electronic throttle body (TB).
- fuel injectors.
- fuel charging wiring.
- fuel injection supply manifold.
- fuel pressure and temperature sensor.

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

Fuel Rail
The fuel rail:
- delivers fuel to the individual fuel injectors.
- receives fuel from the fuel supply line.

Throttle Body

CAUTION: Do not hold the throttle plate open with any object that could scratch the bore or plate while servicing or cleaning the throttle body.

The electronic TB:
- controls air supply to the intake manifold by electronically positioning the throttle plate.
- is not adjustable.
- must be removed from the vehicle to be cleaned.

Fuel Injectors
The fuel injectors:
- are electrically operated by the powertrain control module (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 lower intake manifold.