QX4 2WD V6-3.5L (VQ35DE) (2003)
Fuel Injector: Description and Operation
Component Description
The fuel injector is a small, precise solenoid valve. When the ECM supplies a ground to the injector circuit, the coil in the injector is energized. The
energized coil pulls the ball valve back and allows fuel to flow through the injector into the intake manifold. The amount of fuel injected depends upon
the injection pulse duration. Pulse duration is the length of time the injector remains open. The ECM controls the injection pulse duration based on
engine fuel needs.