Intrepid V6-2.7L VIN R (2003)
Fuel Pressure Regulator: Description and Operation
DESCRIPTION
Fig.8 Pressure Regulator
A combination fuel filter and fuel pressure regulator is used on all gas powered engines. It is located on the side of the fuel pump module (Fig. 8) in the
fuel tank.
It contains a diaphragm, calibrated springs and a fuel return valve.
OPERATION
Fuel Pressure Regulator Operation: The pressure regulator is a mechanical device that is calibrated to maintain fuel system operating pressure of
approximately 400 kPa (58 psi) at the fuel injectors. Fuel is supplied to the regulator by the electric fuel pump through an opening tube at the bottom of
regulator.
The fuel pump module contains a check valve to maintain some fuel pressure when the engine is not operating. This will help to start the engine (Fig. 8).
If fuel pressure at the pressure regulator exceeds approximately 58 psi, an internal diaphragm closes and excess fuel pressure is routed back into the tank
through the pressure regulator. A separate fuel return line is not used with any gas powered engine.
