I have an 00 camaro ss. It usually runs fine but every once in a while it will start to surge while just goin the speed limit but seems fine when you get on it. When you slow down or push clutch in it drops down to around 400 rpm but won't actually die. I haven't found a connection of when it does it but it happens every 4 or 5 times i drive the car. It idled bad like this the first time i started it after the LT header install, but was fine the next time i started it. I haven't got the rear O2's deleted or the emmisions deleted yet but that shouldn't effect it i don't think. I think when the AC is on high the volt gauge sits at the middle line or less after a while and might be part of the cause but not sure on the LS engine. Any help would be great thank you.