Please let me know if I have posted this in the wrong place, but I am asking this due to minor troubleshooting. I noticed there are several other posts regarding rough idles, and I am experiencing the same thing. I think to start my troubleshooting on a good foundation, I should know what the factory idle is supposed to be. My car is a 100% stock, 06 WRX. After warming up, it currently idles at just under 750 rpm, and though the needle does NOT fluctuate, I can feel light, intermittent shaking (not in the pedal, the whole car). It's nothing real dramatic, but I just don't remember it being like that. Its at 74k miles, with fresh oil change and tune-up.