Thank you for the replies. I mainly drive highway miles. I also stomp on it regularly I believe the filter was changed during my last regular service, but I will try that this weekend. They ended up replacing the idle air control. If I have any similar problems I am going to take it to another dealer, the tech here seems to give me a look like I am making up the problems and he has yet to answer my request to check for a intake gasket leak. I mentioned that many other owners have had a similar problem with high rev idle because of the gasket leak and he just looks at me blankly. Anyway, I picked it up just an hour ago and so far so good, I will have a better idea when I start it cold tomorrow.