Jim,
I don't know. It only started a few months ago. I thought it might be an injection problem at first. However that would mean I would have problems at all speeds I would think. The car runs excellent at all other times except during idle. Every once in a while it acts like it is starving for fuel or air. Guess I am going to take it to a mechanic, since I also have the SRS idiot light on constantly now. The only way to figure that one is to get the error codes from what I understand.
Thanks
Eric