Fuel Charging and Controls

FUEL CHARGING AND CONTROLS

The fuel rail:
- delivers fuel to the fuel injector.
- receives fuel from the fuel supply tube.

The throttle body:
- controls air supply to the upper intake manifold by positioning the throttle plate.
- is coolant heated.
- is not adjustable.
- cannot be cleaned.

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

The fuel injection 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.