Need Help, Fuel draining back

[alexx1060]

(09-10-2016 )Signature620 Wrote:  Lift pumps can sound normal but be very weak at the same time. If you tip fuel into the IFSM inlet, does it suck that in?

we took it off to see if the flow direction is correct, and it is. by placing finger on either end you can feel that works, though the suction end feels weaker than the send side. without pressure tester i don't know how to be sure.