First off, thanks to everyone in this group, its a great source of info for a new vette owner like myself. Anyway my Vette idles rough other than that it seems to run fine, every few minutes when driving the check engine light will come on then go off. I tryed checking the codes off the computer per the instructions in the Haynes manual but the light just stays on and never flashes. I don't know what to try now. Thanks for any help.