[LS3 Handler]

Well ive had my intake mods done for a while so was hopeing this problem would work it self out but it hasn't. My car ran better than fine with no problems after i intalled my CAI and then i finally got my VMAX PTB and after i installed it noticed a little hiccup. I have noticed that as im coming to a stop, at a light or sign, when i come to a complete stop the car will try to idle to low and almost cut off then it will idle high about 750-800 rpms. Sometimes after it idles high it will drop back down too far again and then idle high again other times it will slowly drop back down to about 500 rpms and sit steady but even then the idle seems a bit rough. Could this be from having more air flow than the untuned computer can handle? I havent had any CEL's and it hasnt completely cut off on me yet but its just a bit odd. Anyone else experience this?