Fuel Pressure Regulator: Description and Operation

Fuel Pressure Regulator / Closed:

Fuel Pressure Regulator / Open:

DESCRIPTION AND OPERATION
The Fuel Pressure Regulator maintains a constant fuel pressure to the Fuel Injectors. When the difference between the fuel pressure and Manifold pressure exceeds 3.0 kg/cm2 (43 psi), the Diaphragm is pushed upward, and the excess fuel is fed back into the Fuel Tank through the Return Line.