weird fueling problem

[GTD.]

Fitted a digifant GTI tank lift pump

now when I put the ignition on I see fuel going though the pump return line but the feed line is often empty turn ign off and the fuel back feeds up the feed line.

theres a little bit of fresh fuel on the filter arround the pre heater fitting

if I wiggle the inlet hose at the banjo when it starts the feed hose fills with frothy fuel

do i have a blockage in the pump feed hose and a dodgy seal on the preheat fitting?

looked for new clear feed hose on ETKA ETOS but it looks like they are deleted

[Rabbit on Roids]

restriction somewhere.. thats the only reason i can think of. or you simply have an air leak and its loosing prime..