Anyone know what would cause my idle to fluctuate? It's usually around 700 but sometimes drops to 600 but more often it will rise to around 800. It usually rises when I'm in stop and go traffic and doing alot of idleing at red lights. The other, while sitting in a drive thru I was acually watching go from 800 then it was 815 and it got up to 830. It seems to happen more when its hot out and its starting to get pretty hot down here in Florida. Thanks for any help.