I have an 2007 350 Mag in a 230 Sea Ray. Bogs with throttle increase unless it is slowly increased. I have read several threads here and on other sites and am now rather confused. Checked fuel rail pressure non running o psi. Switched on pump comes on and psi goes up to 43-45, pump shuts off and pressure falls back to 36-38 and will slowly fall to 30 over a minute or 2. Idles at 34-38 with heavy needle vibration. Pull vacuum line at regulator (or pressure damper as some have suggested on other threads) on rail with no change. Funny thing is if I remove my finger from disconnected vacuum line causing an engine vacuum leak the fuel pressure rises to about 40-41(that seems strange to me). Serial number 1A041805. Was going to do a injector balance test but first I have to get some sort of constant reliable pressure. Confused from other threads because some have said that this regulator at rail is a damper and the other fuel pressure regulator is port side below manifold with fuel pump. Thanks for any advice, appreciated.