Fuel Injector: Description and Operation

The fuel injectors are:
- electro-mechanical devices which meter and atomize fuel delivered to the engine.
- mounted in the lower intake manifold (IMRC) and positioned so that their tips are directing fuel just before the engine intake valve.

An electrical signal from the Powertrain Control Module (PCM) activates the fuel injector allowing the fuel to flow. Since the fuel injector flow orifice is fixed and the fuel pump pressure drop across the injector tip is constant:
- fuel flow is regulated by the length of time the solenoid is energized.
- fuel is atomized by the director plate at the point where the fuel separates.