Fuel Charging and Controls

The fuel charging and controls system consists of the:
^ throttle body
^ fuel injectors
^ engine wiring harness
^ fuel injection supply manifold
^ fuel pressure relief valve

The fuel charging and controls system is:
^ a Sequential Multiport Fuel Injection (SFI) system.
^ pulse width modulated.
^ mass airflow controlled.







The fuel injection supply manifold:
^ delivers fuel to the individual fuel injectors.
^ receives fuel from the fuel supply line.







The throttle body:
^ controls air supply to the intake manifold by positioning the throttle plate.
^ connects the accelerator cable and the speed control actuator cable to the throttle plate.
^ is not adjustable.
^ must not be cleaned.







The fuel injectors:
^ are electrically operated by the Powertrain Control Module (PCM).
^ have an air assist feature to aid in atomization of the fuel.
^ each have an internal solenoid which opens a needle valve to inject fuel into the lower intake manifold.
^ atomize the fuel as the fuel is delivered.
^ are deposit-resistant.
^ do not need cleaning.

The fuel pressure relief valve:
^ is used to relieve fuel pressure.

The engine wiring harness:
^ connects the fuel injectors and other electronic engine controls, such as the Throttle Position (TP) sensor, to the powertrain control module.
^ receives fuel injector signals from the powertrain control module and transfers the signals to the fuel injectors.