Yep my bet is the fuel pressure regulator, just changed mine. It's on the fuel rail driver's side, looks like a vacumum diaphram. Pull the vacumum hose off, if gas comes out it is bad. I got a new one for $50 at the auto parts store, took strong fingers and about 10 minutes to change it, the old one left a lot of parts inside the rail, be sure you get them all out before installing the new one. 110% better since I changed it, cheap and easy fix (without the dealer involved that is)
Lance