Fuel Pressure Regulator: Description and Operation

Fuel Pressure Regulator:

PURPOSE
The fuel pressure regulator maintains fuel rail pressure at 31 - 37 psi (206 - 255 kPa) above manifold pressure.

LOCATION
Mounted on the fuel rail.

OPERATION
Manifold pressure to the regulator through a vacuum line. As the vacuum drops under load, fuel pressure is increased to compensate for the additional fuel demands.