my brothers truck is pulling these two codes P0251 CP3 Pump Regulator Control. but what needs to be replaced or adjusted??
just put a raptor 150 lift pump on it and not sure if that is it or what??
the second code is P0148 High Pressure Common Rail (HPCR) Fueling Error Checksum is this caused because of the p 0251??
need help thanks
04.5 5.9 3500.

 

Does the rail fuel pressure fluctuate more then 500PSI when at idle? If yes then replace the fuel control actuator (FCA).

Part No. 05183245AA Actuator

 

Yeap, sounds like a bad FCA.

 

today i was driving and the truck lost all power and started blowing black smoke and shut off but started up again what would that be?

 

I agree with the FCA....but also could be the cascade valve on the CP3, if the Raptor 150 is pushing too much pressure to the CP3 injection pump, the cascade valve will open, bypassing fuel to protect the CP3.

You need to check the pressure from the Raptor to the CP3, should be around 20 lbs.