CM2350 fuel rail issue

[SquareOne]

What are the miles on the pump currently? The high pressure fuel pump heads do go bad and aren't serviceable. There is a check valve inside the head that once compromised, requires replacement in order to correct.

I had this issue occur a couple years back on my 2350. I wasn't loosing nearly as much fuel pressure during the test, but I did have an external leak at the torx style plug on top of the head once the pressure test reached about 25k psi. Maybe there are other symptoms of the head failure someone else could elaborate on...

- Not sure if this pertains to you, but it is another direction to go after if everything else seems to check out. BTW, when performing the test with the compromised head, the engine would stumble once the psi started getting above 20k psi.


This is the thread about the issue I had...
https://rawze.com/forums/showthread.php?tid=7266