replaced the maf, and still have a choppy idle after the relearn, when up to temp ican unplug the IAC and idle jumpes to about 1200 but stays steady. Is this an indication the IAC is indeed bad? and I still have a vacuum leak I can hear inside the car, it seems to be coming from the vacuum block for the hvac under the dash behind the glovebox, has anyone ever tried using rtv to seal a vacuum leak and had success?