5.slow99

so i switched fuel pumps to a walbro 255. i have a 76mm turbo ls1 with ls2 rails and such. this is the first start. i hit the key pump turns on and the car cranks, cranks, cranks, and cranks some more. i hit the Schroeder valve on the rail and i get nothing. no fuel at all. are the walbro pumps reverse polarity or am i missing something simple??? thanks in advance