Another thing you could check too, pull out your PCV valve, shake it, make sure it rattled and ain't clogged with **** (like RTV). Hell, you may as well replace it, there cheap, like a $2? Be sure to save the o-ring. Check in the hole, make sure there ain't RTV gunked up in there. If there is, clean it out. I've heard of someone having an issue with there PCV a long time ago and it was because of WAY too much RTV to seal the S/C gaskets. Just a thought.