LB7: ppe dual fueler not holding commanded rail

[DIESELMAFIAPER.LB7]

So no codes but still not holding, it hit 175mpa then tapers off to 168-170 mpa. I unplugged one of the regs hit 180?? But wont hold it. Starting to think either a weak pump or maybe injectors returning to much??? Or maybe that fprv is bleeding pressure

Im still going to race as 170 mpa isnt bad really just want it back to tip top shape

 

[DIESELMAFIAPER.LB7]

Bringing this back up as its slowly getting worse street tune is only holding 21-22 ksi now and im starting ti wonder if my II Modded pump is dying off..... its not there big pump but thinking of replacing it with a new stock pump as the trucl used to hold 26ksi with ease and slowly gets worse