I have a 99 Ford Windstar and the RPM's will fluctuate from 1000 to 2000 when at idle and then shut off within a few seconds. This seems to only happen in the morning when its cold and only at idle, if I put it in park it seems to get better. I have gotten ripped off by mechanics before so I thought mabye someone could help me figure out what the problem is before I take the car in. I am a single mom and don't have the money to throw away espeshally before Christmas. If you someone could help thanks.