Not a Camaro , but still a Chevy!! I have a 94 Lumina with a 3.1 liter. This probelm started soon after a battery failure left the car dead on the road.( not sure if there is any coonection ) Anyway, cold starts are fine, but a re-start after the car has been thoroughly warmed up and had a chance to cool for a bit idle races up to about 2K and slowly drops down to normal. The car doesn't have any codes stored , in fact the only code I've seen in the 240K we've owned is was an EGR 32. I will say , within the last couple months my daughter has said the SES light has come on but goes off and it has been the EGR valve. Any thoughts woudl be appreciated, I'd hate to give in and put her in the shop ...again. I don't want to knee jerk and replace the EGR at $180 but if I knew without a doubt then i'd do it.