The electronic injectors are activated or “fired” by a driver module, which is activated by the engine’s powertrain control module (PCM). This information is provided to the PCM from a cam sensor located above the harmonic damper in the front timing cover. The cam sensor is a hall effect switch that tells the powertrain control module what cylinder is ready for injection.
Oil Fired Injectors..
When the electronic injector is energized from the injector driver module an electronic solenoid mounted on the injector opens a poppet valve. High-pressure oil from the HPOP flows into plunger, which moves downward, increasing fuel pressure and opening the nozzle. Fuel is then injected into the combustion chamber at pressures as high as 18,000 psi.
now, about that blinker fluid you thought was a joke...!!