Some times whens its hot out and I've been driving though traffic lights I'll stop at a a light and my idle will rev while waiting at the light. It will hold about 1500rpms and some time rev up to 3000 and stay there. I was wondering if there is anything I could clean to see if it helps. Or is it possibly the icv or the maf? Thanks for any help.

 

it probabaly MAF!