Hi everyone i’m New here but have been lurking for over a year since I bought my 2001 Boxster S. As you already know I abosulutely am in love with this car, how could you not be. First let me say thanks for this forum and your input it has been most helpful for me and my Porsche. I am having a slight idle problem that seems to be baffling my mechanic. After the engine warms up, at idle, the tachometer revs up and down. I recently replaced the OAS and didn’t have the idle problem before it was replaced. So I was thinking maybe that’s the first place to look. That said my mechanic is talking maybe a vacuum leak...we are finally having nice weather here in NY so I have been driving with the top down each nice day. The last few days have been more than hot and humid, so on goes the ac...I noticed that with the ac compressor on the idle problem ceases to exist. Shut it off and back comes the idle issue. I’m not sure what that could mean but I do know it means something. I’m just a novice when it comes to Porsche techs and mechanical issues. So if anyone out there can throw any light on my situation I would greatly appreciate it. Fwiw, I may not be a genius with these technical issues, but let me reassure you that I have the shiniest Porsche on block....Thanks Zip

Yes new Porsche AOS and hoses, I also suspect the problem might be connected to that recent change. Probably start there thanks for the response.