its been a long time but im sure that 3 outlet fitting is a vapour separator and connected like that it isnst (separating vapour). does fuel flow through it to this point?
dazza
sorry we are all so vague but diagnosis is difficult getting info in small bites

this should be an easy prob to fix if you
1)examine entire fuel system layout
2)understand how it works
3)test system starting at one end and systematically working your way to the other
4)option! run carb gravity fed from fuel tin bypassing entire car system (eliminates carby)

expect your next post will be "guys! its fixed"
dazza