problem fuel system

[CumminsPride]

Wouldn't the pump last longer if mounted on the frame rail nearest the tank? I didn't think that electric pumps were meant to LIFT that far. They are designed to be pusher pumps more than lift aren't they?

[ford69557ci]

yes the closer the pump to the tank the better they are made to push more than draw

[cummins king]

yes i know that eletric pumps like to suck closer from the tank but thats not the problem the problem is im losing my prime in the injection lines and ip

[cummins king]

maby i will try plugging the return line and see if thats were the fuel is gooing and if not then i know i have a air leak somewhere between the check valve and the injectors

[ford69557ci]

whats the purpose of the check valve?

[cummins king]

because the tank is lower the the rest of the fuel system it will sifen all the fuel back with out it, at least thats what i think

[ford69557ci]

the factory fuel system uses no check valve?? and the factory system has to pull all the way from the tank to the lift pump.

[KTA]

The stock lift pump has 2 check valves built in it, otherwise it would not pump fuel, all diaphragm pumps require check valves.

[cummins king]

i fixed the problem wish me luck on the first test drive with the twins

i will tell you ablout it later
CK

[cummins king]

All i can say is WOW, the power that it has is crazzy now, one thing that scarys me is im putting 30psi now into the front of the pump, it seems like theres a ton of extra smoke now and 30pounds of boost is all i have been to but its there in seconds, you should here it wisle, nothing is leaking hotpipe is just a bit leaking got to put a small weld on, but wow i wonder if the extra fuel in the front is making more power, but im going for another test drive tonight cant wait

CK

oh try sucking through a straw with a crack in it, thats what the problem was in the tank, got to pull the sucton line apart, and fix, just got to run with a full tank for now