2250 Dreaded Fuel PUMP

[Smooth]

The Pump Head had already been replaced at some point as it did not have the Ceramics in it, but one of the plungers was sticking. Originally was just going to rebuild pump head but then when got a look at the cam in the actual pump was eat up. Fortunately this is not my truck and the owner I am trying to help does not want to look at other possible issues.
You can lead a horse to water but..........

Will go thru the cummins trouble shooting process and update for info for others later. Already have a check valve coming for the fuel rail at the rate of fuel psi fall off is an educated guess that is the issue.