Wow what a BIG difference!! I have the Intank retrofit pump, and along with the relocation kit and the cummins campaign pump, it is currently making 20psi @ idle. Driving the pressure hardly fluctuates, I really have to romp on it to get it to drop pressure. Now I feel comfortable that that this thing is getting enough fuel. When I was purging the system to get the air out, I had about 2 gallons in a container after 3 key cycles. Now my only concern is that I have too much pressure. If you haven't done this mod yet, do it!