see what i dont get it is with the truck running and a fuel gauge hooked up to it if u hit the bleed off button on the gauge it drops right to 60 and runs fine but if i unhook the return line from the quick connect next to the fuel filter it runs rough still ill try unhookin it farther back but it doesnt really make sense to me if it was a clogged return and i take it off and it comes out fine with high pressure and runs the same how is it going to be farther back if there was a restriction back by the tank when i unhook the line it should run fine.. thanks though