I've had this problem start happening just recently,
I bought this car about a month ago, about a week ago it started happening.
The old owners didn't drive the car much, maybe like a few times a month they told me, it's my daily.
What happens is on a cold start, or even after a few hours(4-5 hours) of sitting. When I go to turn the car on its cranks over and starts just fine but the idle immediately goes down to the point of turning off(it's only turned off once) but then shoots back up and the idle starts bouncing up and down but eventually smooths out. Sometimes it doesn't bounce as much as in the video, usually just shoots down then goes back up to normal idle. It also squeals when this happens, the squeeling goes away after I warm up the car.
I'm have no idea what this is, I think it might be the alternator, and the squeeling might be coming from the pulley. But any input would help
