ernz

ok so today I was driving my car and everything was a ok. As I left my home she started fine until I stopped at a light and she started to idle weird. Its was a steady idle but instead of idling at like 800rpm as usual it was bouncing from 1000rpms to 2000rpms. The car ran fine home. I shut her off then turn her back on and still was idling the same so I took her for a spin to see if it would go away and sure enough after driving for about 10mins I pulled over and she was idling fine. Any ideas because I have no idea. This was the second time its happened to me since Ive had her.