2016 ISX15 Cummins Fuel issue?

[tree98]

How many miles were on that pump ?

Can you get the old pump from him so you can check it out?

If not, your gonna need to drop the oil pan and take a crank bearing off and look for damage. You'll see metal in the bottom of the pan too, you'll probably see some when you drain the oil

I hope this isn't your problem but you need to know definitively whether or not that pump failed catastrophically.