I wouldn't be convinced it is the pump
Sounds like the issue from before is still there.
Did you have a reason to suspect the 1st pump?Other that it wouldn't start.Where there running issues,starting issues befor the pump change?
I have heard that a pump going bad will take a long time to actually quit working.
I would take a look at the shutoff solenoid,your new pump may have a 24V one.If the shut off was bad on your old pump then you will be chasing things that aren't there.
I have bought a few New in box pumps off ebay with 24v shutoffs,there were lots of military take offs on the bay for years buddy may have got one of those rebuilt and it still has the 24v shutoff.
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews