So I have a ‘13 lml deleted with a FASS lift pump. Recently been having loss of power/dying at low rpms, it showed “engine power derated”, and the p0091 fpr1 voltage low code. So I changed the pressure regulator on the injector pump. No shavings or anything to be concerned about when inspecting the old fpr screen. Put it back together yesterday afternoon. Ran for a second or two then died and hasn’t started since. Am pretty sure it’s not getting fuel. Made sure to prime the fuel system. Found one wire that was rubbing and fixed that. Even tried putting old fpr back in to see if the new one was bad. What am I missing y’all? Thanks!