I just installed an adjustable fuel pressure regulator, and noticed that when I set the pressure with the engine running and no vac line, it read 40. Then I hooked up the vaccum line, and it still read 40. The car runs ok, but then when I take it out, the pressure stays right at 40, no matter how hard I hit it. Does this mean that I have no vaccum? SHouldnt that vacuum line adjust the fuel pressure with the RPM's of the engine? Also, since the vaccum line comes straight out of the intake, wouldnt the leak have to be in the line itself? THanks for any input