Hi Everyone, haven't been on the boards for awhile. As an fyi, I already searched and didn't find my answer. I just picked up an 87' l98 Roc. It runs great with one exception... It idles too high. In drive I am at about 1000 rpm. In park about 1500 rpm. I already set and adjusted the tps. I cleaned the iac, and I also adjusted the idle speed. I read the tech page on how to adjust the idle and I did it right. It seems when I get the idle where I wan't, it stays there for a few minutes and it goes right back up. I tried disconnecting the battery and that didn't work. I'm lost. Any help is greatly appreciated.