Characteristics: The function of the fuel pressure regulator is to maintain the oil pressure in the fuel distribution pipe and the air pressure in the intake manifold unchanged, allowing the ECU to control the air pressure individually. In addition, it provides both simple and precise control of the fuel injection quantity during the duration of the fuel injector opening FCA - Fuel Control Actuator, FPR - Fuel Pressure Regulator. These are also called MPROP. The symptoms of a faulty MPROP would be rail pressure that is too high or too low. Maintains constant fuel pressure to the CP3 High-Pressure Injection Pump+ Specification: .
