[jrdv]

I hate to hear your having trouble. I love my Fast EFI.

I put mine on myself and it has had zero problems so far. I agree with truckdude239 on the possibility of the hose collapsing.

Did the shop use the hose that came with the kit? Did they just tie into the hard fuel lines or is it all hose? Is the pump within 18 inches of the tank? Is your gas cap vented?

I used all rubber EFI hose for both fuel lines. Mine is tied into a toolbox/gas tank combo ( It is a 4x4 ).

I really don't think it is your pump.....what are the odds of getting 2 bad pumps? It just sounds like a fuel starvation issue to me.

John