Description
If the Bosch 0928400535 Fuel Pressure Regulator, MPROP, FCA, Fuel Control Actuator is not correctly functioning; this results in the Engine Control Module / ECM cannot determine the fuel flow rate supplied to the CP3 Fuel injection Pump. In most cases, people first know there is an issue when they have a hard start or no start issue because the MPROP will not allow the pump to build pressure to start correctly. However, by the time this symptom occurs, the truck has probably been delivering less than they genuinely desired amount of fueling for a while already as the FPR is a simple spring design that many times takes a rather slow death and not an immediate failure. The Engine Control Module / ECM uses the fuel control actuator to control the fuel pressure in the LB7 Duramax diesel. The Fuel Pressure Regulator – FPR is an electronically controlled solenoid valve. The ECM controls the amount of fuel that enters the high-pressure pumping chambers by opening and closing the Fuel Pressure Regulator based on demand. The Fuel PressureRegualtor is the device that controls the fuel pressure delivered to the injector rails to provide fuel delivery rates.
- GM 97728979
- Bosch 0 928 400 535
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