I have a 2005 NA Limited Roadster, put the MagnaFlow cat-back exhaust on about a month ago. Got my 74mm MB TB and Needs Wings single CAI installed this past Friday, and threw the updated EuroCharged tune into the computer. Car runs great, sounds great, and performs great... most of the time.

Every once in a while, I'll find it idles high, like 1500rpm compared to the normal 750-800. Some times it does this right off start up, some times it does it while driving / in between shifts (if I hold it in neutral for a while), or at stop lights. Some times it goes away on its own, some times I can load up the engine some and force it down and it stays, and some times I have to cycle the car off / on and it goes back to normal.

As I changed 3 things at once (TB, CAI, EC Tune), I can't say for sure what the actual issue is. I doubt the CAI did it, unless I screwed something up with the MAF and it's causing an issue.

Any thoughts?
-Kevin