Alright guys, I’ve been reading threads on these forums for awhile now, and I’ve got a question that I can’t seem to have anybody help me with. So Cummins owners/mechanics, I have a 99 24valve 5speed, 4wd. Edge comp box, I have replaced the lift pump with an AirDog Raptor, new Fuel Head that eliminates canister for screw on filter, XDP injection pump, New ECM, New APPS, MAP. The truck at idle when I start it is at 15psi. When I’m driving it’ll be about 10-12psi, but when I get on the pedal to pass someone or simply to get on the pedal, it will drop down to about 4-5psi. Ever since I’ve replaced the VP44, it wants to lose fuel pressure after it sits for about 30minutes or longer, and will have issues wanting to start back up. No visible leaks of fuel anywhere that I can see, so any help would be grateful! Thanks.