Fuel Injectors

The fuel injector is a small, precise solenoid valve. When the Engine Control Module supplies a ground to the fuel injector circuit, the coil in the fuel injector is energized. The energized coil pulls the ball valve back and allows fuel to flow through the fuel injector into the intake manifold. The amount of fuel injected depends upon the injection pulse duration. Pulse duration is the length of time the fuel injector remains open. The Engine Control Module controls the injection pulse duration based on engine fuel needs.