[asshanson]

Ok so I have confirmed the white plastic thingy is the siphon from the other side of the tank, but I don't think fuel from the feed line is supposed to go out where the black lines are pointing. So I removed that piece (temporarily for testing purposes) and hooked the pump straight to the tank output. I verified I'm getting full flow now at the rail, over a gallon a minute with just 12v when the car was off. But now the car can't even hold 60psi at idle like it was before, I have no idea what is going on. Maybe there is a leak in the lines inside the tank at higher PSI, that's the only explanation I can think of, but I'm still stumped why it's even lower pressure with the pump going straight out the tank.