Fuel Injector(s)

When the solenoid coil of the injector is energized by the control unit, coil becomes an electromagnet. This lifts injector plunger, allowing fuel under pressure to be injected into the intake cylinder. Since fuel pressure is relatively constant, air/fuel mixtures are controlled solely by the injector "pulse width" ("on" time). Control unit determines proper pulse width based upon input signals from various sensors and switches.

Timing of injector firing is determined by control unit based upon RPM signals received from the distributor P/M generator. The control unit also monitors ignition coil signal. Since control units interpret coil signals as an indication of spark presence, if ignition coil signal is lost, fuel injector triggering will cease.

Swift utilizes Port Fuel Injection (PFI), which incorporates 4 fuel injectors which are mounted in a fuel rail assembly. Fuel rail mounted injectors are sprayed simultaneously at back of intake valves.