Ive been looking into my 4500 chassis having a lift pump for factory tank . found it , but its for a chassis with 8.1 gasser . Dont think that will hold up to diesel fuel . Guy at dealer parts told me he had sold a guy a lift pump for a 4500 that goes in the tank . We looked and damn it is a 8.1 gasser .
I measured from my tank to filter . Your going to crap . 18 ft. of fuel line to get there to motor. Thats a long way . Explains why before the 2 cp3's I couldnt hold above 17,000 . I am holding 27,000 , but I still think it is making these pumps struggle to suck fuel . They were designed to be run with lift pumps the way I understand it , but GM deleted that out of the system and put them in without . GM should have put a lift pump on these 4500's from the factory in my opinion .
My tank being 18 ft from motor has to be a real strain for the pumps . I was trying to come up with a lift pump in my tank . I dont think the gasser pump will like pumping diesel .
Where is the van lift pump ? On the frame rail or in the tank ?
I guess a Fass or air dog is my only option . Interested in the van pump though if it would work or maybe the factory dodge lift pump .
Johnny