[92Rustang]

I just got my new springs on and RR adjusted car sounds great. One problem I switched to a BBK FPR from a holley and when the pump turns off pressure drops to zero fast. I do not smell gas and I can not find any leaks. I would think at 38 psi I would see gas somewhere? I call summit and they seem to think that it is OK the fuel is going to the return line. My holley would hold pressure for a day. Also what would be the point in the pump turning on if the system did not hold pressure? Thanks for the help guys I can not wait to see how this thing runs not that I have the valve train right.