I've already done a search for idle shaking but didn't find a scenario like mine. Anyway, the car shakes quite a bit sometimes if it's in neutral with the A/C on. If the A/C is not on, then the RPMs are a hundred or so less like they're supposed to be and it still shakes a little but not nearly so much. Put it in drive and the car vibrates but doesn't really shake. Cleaned throttle body earlier which fixed my stall after ignition problem. Any suggestions?