Almost all the fuel lines on the supply side of the IP are clear, and there are no bubbles in them.

when i pump the primer pump there is no (or very little) fuel coming out of the return from the IP. It just kind of builds up pressure somewhere. but it has run fine before with the fuel system the way it is now.

i can't see how it can stop working after putting the new turbo in... thats whats got me stumped. it makes me think it has to be air... but theres no air visible in the lines up the the IP