Regal V6-3.8L SC VIN 1 (1998)
Fuel Pressure Regulator: Description and Operation
The cartridge type fuel pressure regulator (1) is a diaphragm-operated relief valve (6) with fuel pump pressure on one side, and regulator spring (2)
pressure, and intake manifold vacuum on the other side. The regulators function is to maintain a constant fuel pressure across the injectors at all times.
The pressure regulator compensates for engine load by increasing fuel pressure as engine vacuum drops.
The cartridge regulator is serviced as a separate component. When servicing the fuel pressure regulator, insure that the O-ring backup, (3) large O-ring,
(4) filter screen, (5) and small O-ring (7) are properly placed on the pressure regulator.
