Fuel Loop

Vehicle fuel loop delivers fuel to engine and returns unused excess fuel to tank by return line. Fuel enters fuel rail and is sprayed into engine through 4 energized injectors. Unused fuel continues through loop to pressure regulator, which is located on throttle body.

Mechanical pressure regulator maintains constant pressure of 55 psi (3.7 kg/cm² ) at injector tips. Spring-loaded rubber diaphragm will move to uncover return port when pressure exceeds specification. Diaphragm will open and close continuously to maintain 55 psi (3.7 kg/cm² ) in fuel system loop.

Fuel injectors are electrically operated solenoid valves which are powered by power module and controlled by logic module. Logic module determines injector pulse width or dwell period and sends this information to power module. Power module will then energize injectors for required period of time.