Ok, I still cant find anyone that has posted definite results or findings on their rough idles, and I'm at another dead end. After engine is warmed, idle stays around 750 rpm but the car will intermittently shake with little or no rpm fluctuation. I changed the spark plugs a while ago, didn't fix it. Found small traces of oil in throttle body after popping intercooler off, so changed the PCV, still didn't fix it. Oil is great and all other maintenance is on point. Does anyone have any more ideas? The only next step I cant think of is to replace every hose under the hood or leave it at the mercy of a tuning shop with a surprise $1500 bill to follow. It's a 2006 WRX Limited, BONE STOCK. 77,553 miles. Thanks for any help!!!