If you have 25 psi out of the pump, it sounds like a pump made for an EFI system, which may not be appropriate, even with a pressure regulator. What pump do you have?
Edit to add: Or the gauge is off.
a carter fuel pump for a carb engine. my problem is a bought a fuel regulator I turned it all the way down and according to my fuel gauge I'm still at 20-25 psi I don't know what I else I can do , everything is new ( even the fuel lines ) ?
