Gotta get this sorted out!

If you check for fuel pressure, check volume also.
i don't know the specs, but the equation should be that the pump fills a gallon in x amount of time, or quart, or whatever volume you want to use. You may want to put an electric pump on if you find that it is the pump, go full race equipped. I copied these specs from Summit on the Carter M6902 fuel pump:
Free Flow Rate:120 gph
Maximum Pressure (psi):6 to 7.5 psi
Im thinking GPH is gallons per hour, you should be able to fill two gallons a minute.