Fuel Charging and Controls

FUEL CHARGING AND CONTROLS

The fuel charging controls consist of the following:
- fuel injection supply manifold
- electronic throttle body
- fuel injectors
- fuel pressure and temperature sensor
- fuel pulse damper

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 upper intake manifold by electronically positioning the throttle plate.
- is not adjustable.
- cannot be cleaned.

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

The fuel pressure and temperature sensor:
- measures the pressure and temperature of the fuel in the fuel supply manifold and sends these signals to the PCM.
- uses intake manifold vacuum as a pressure reference.

The fuel pulse damper:
- reduces fuel system noise caused by the pulsing of the fuel injectors.