I cleaned my ICV last week, and instantly I noticed a nice improvement in the car's 'breathing'. But then after a day or two, the idle seems a little rougher than before I cleaned it. While idling rough, the car rocks slightly from side to side. It'll do this every 20 or so seconds, until the car has been driven a few miles and the engine is thoroughly warmed up. It also hesitates slightly when starting from a standstill . . used to do that only with the A/C on, but now it does it more often.
I'm gonna change out the O2 sensor next week, see if that does something. I guess that would be the next step. But other than that, anyone have any other ideas, thoughts, or suggestions??