NPR L4-5.2L DSL Turbo (2005)
Fuel Pressure Regulator: Description and Operation
Fuel Rail Pressure (FRP) Regulator
The fuel rail pressure sensor is installed to the fuel rail and it detects the fuel pressure in the fuel rail, converts the pressure into a voltage signal, and
sends the signal to the engine control module (ECM). Higher fuel rail pressure provides higher fuel pressure sensor voltage while lower pressure
provides lower fuel pressure sensor voltage. The ECM calculates actual fuel rail pressure from the voltage signal and uses the result in fuel injection
control and other control tasks.
