I have owned 2 CRV's. One a 2003 which I have now and the other a 2005 which was totaled during a wreck but both had similar problems that seemed to start after the cars had over 100,000 miles or pretty close. When coming to a stop the idle will almost go so low that the engine will stall. A/C cycles off, fine, on, engine vibrates and you can see idle around 500 rpm's. After replacing all motor mounts, which seems to be another Honda issue, hoing that would take out some of the vibration issue it continued. On both vehicles I have cleaned the IAC motor, checked for vacumm leaks as best as possible but still seem to have this issue. It gets tiring to replace parts hoping one will fix the issue, like the IAC motor, O2 sensor. Most of the answers I have come across never seem to fix this problem. Would love to find one somewhere that could give me a better fix or is this something you have to live with since you have such a small 4 cyl in a bigger vehicle?