Fuel Charging and Controls

The fuel charging and control system consists of the:

• electronic throttle body
• fuel injectors
• fuel charging wiring
• fuel injection supply manifold
• fuel pulse damper
• fuel pressure and temperature sensor

The fuel charging and controls system is:

• a sequential, multiport fuel injection (SFI) system.
• pulse-width modulated.
• mass airflow (MAF) controlled.

The fuel injection supply manifold:

• delivers fuel to the individual fuel injectors.
• receives fuel from the fuel supply line.

The electronic throttle body:

• controls air supply to the intake manifold by electronically positioning the throttle plate.
• is not adjustable
• must not be cleaned
• is serviced as a complete assembly only. For additional information, refer to THROTTLE BODY .

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.

The fuel pulse damper:

• reduces fluctuation of the fuel pressure during injector operation.