I've been going through the idle problems that keeps rearing its ugly head for almost a year now. Its a random thing. So yesterday I replaced my tps and set it up to spec. The old one was definitely shot. So I was sure this would solve it. Started it up and idled fine until it got warmed up and then it started idling erratic again. I've checked all the usual suspects, but keep leaning at vacuum leak. So I started from one end of the engine bay and I found a crack on my charcoal canister. In the pic I just dabbed some gasket sealer on it and let it sit overnight. Started today and after warm up no more idle problem. It just seems weird that this would cause idle problems. Well anyway, I hope maybe this can help somebody in the future.

 

Could be. Time will tell.........