I need help bad!!

Okay guys here is a mind bender for you. I have a 1994 Chrysler LHS 3.5 V6 and it has a bad ruff idle. I have replaced my MAP sensor with no change. I also disconnected the vacuum hose to the fuel pressure regulator and the idle evened out. I replaced that not to long ago. So is that the problem again? If so whats making it keep going out? Please help me with this I can't figure it out.

Okay i fixed this. It was the intake manifold gaskets. They were bad.