DeVille V8-4.6L VIN 9 (1995)
Fuel Pressure Regulator: Description and Operation
Fuel Pressure Regulator
FUEL PRESSURE REGULATOR
The fuel pressure regulator is a diaphragm operated relief valve having fuel pump pressure on one side and regulator spring pressure and intake
manifold vacuum on the other side. The function of the regulator is to maintain a constant pressure difference across the director spray plate in the
injector. The pressure regulator compensates for engine load by increasing fuel pressure as engine intake manifold vacuum drops. The pressure
regulator is mounted on the fuel rail.