So far there's nothing in your post that indicates a problem. That T-Rex is a pass through pump. The only time that thing is going to kick in and provide any kind noticable action is when the fuel pressure and get's so high that the intank pump can't supply the volume necessary to feed the hungry fuel rails and injectors. If you're installing this T-Rex on a fuel system that's running at near stock fuel pressures then you're wasting your time. All you'll really accomplish is a little bit of extra heating of the fuel. A regular ole intank 255 pump flows about 233 lph at 40 psi. Any guesses for the T-Rex? How about 162 lph at 40 psi. Those inline boost pumps are designed to provide additional pressure and/or volume when the rest of the fuel system gets down to or below a predetermined point. The T-Rex is pumping all the time, don't get me wrong, but it's not going to show you any measurable result unless your fuel demands exceed the output of your stock pump. And yes... in this case, your T-Rex IS providing a resriction. At normal fuel pressures, an intank 255 outflows a T-Rex and the T-Rex is just getting in the way.
