D21 Hardbody 2WD L4-2389cc 2.4L SOHC MFI (KA24E) (1990)
Fuel Injector: Description and Operation
Fuel Injector
The fuel injectors, located on the intake manifold near the cylinder head, are small solenoids that allow fuel to be injected into the intake manifold.
The injectors receive the ground circuit from the ECU in terms of "Injection Duration". The voltage applied to the electrical windings pulls the
needle valve up allowing fuel to flow through the nozzle.
WARNING: The positive circuit is always "Hot" at the injector terminals when the battery is connected.