2016 ISX15 Cummins Fuel issue?

[steeldck]

That Pump had 650k on it for Miles. Im trying to find out if he took the pump apart. I know the ones ive seen had been worn, like the cam and rollers had some wear spots in them, havent seen or heard of one exploding pieces into the engine though. This truck ran just fine on the way to the shop to get it checked out, like I said, the problem was intermittent from the get go, even before the fuel pump was replaced.
I took the pump back to the parts stealer for the core charge, I should check to see if its still there, pull the head.

Rebuilding or replacing a fuel pump on a rig with 400k on it, seems a bit fugged to me.