Fuel Pressure Regulator: Description and Operation

FUEL PRESSURE REGULATOR




The fuel pressure regulator is located in the fuel tank and is part of the fuel sender assembly. The fuel pressure regulator is a diaphragm-operated pressure relief valve consisting of a diaphragm, a spring, and a valve. The fuel pressure regulator is inserted into the fuel sender assembly and sealed with one or more o-rings (1). The fuel pressure regulator used with the composite fuel tank is a double o-ring (3) design, while the regulator in the steel fuel tank uses a single o-ring (2). A correctly calibrated fuel pressure regulator ensures that the fuel is delivered to the fuel injectors at the correct pressure.