hi everyone. I normally don't post on the prelude forums because i dont have one but my friends do. I already searched through past threads and couldn't find an answer to an idling problem that my friend has. My friend has a 1993 prelude that he just bought. It's in ok condition but he wants to fix it before he puts it on the road. The problem with the idle is that after it is warmed up the rpm bobs up and down. It shoots up to 2k and down to 500 nonstop. If anyone knows what the problem is it would be greatly appreciated. I read that it could be the pcv valve or idle arm thing but i'm the symptoms that the other people have are slightly different. Once again thanks alot, and i'm sure you prelude fans will be as helpful as the ones I talk to on the integra forums.