Injectors are located in throttle body unit. All models use 220 Series dual injector throttle body. Battery voltage is supplied to injector when ignition is on.
PCM energizes injector solenoid by providing a ground path through its internal circuitry. By regulating injector ground circuit, PCM controls injector "on" time (pulse width) to provide proper amount of fuel to engine. In the "run" mode, control module uses tach (RPM) signal to determine when to pulse injector. Injectors are pulsed alternately.
Pressure regulator maintains pressure to injector at 9-13 psi (.6-.9 kg/cm 2 ). Excess fuel passes through pressure regulator and returns to fuel tank.