Fuel Injectors

Solenoid-operated fuel injectors are controlled by ECM or PCM. Amount of fuel required is determined from a base air/fuel ratio which is then adjusted for specific operating conditions. ECM or PCM varies number and duration of injector pulses per engine cycle to regulate fuel flow. Injector timing is synchronized with engine rotation, except during starting and acceleration. All normally-aspriated V8 engines are equipped with air-assisted injectors, which are modified with a plastic shroud over the nozzle.