This winter,I have had some weird idle issues.When the car is cold--it surges between 1000 rpm and 1500 rpm,up and down,up and down untill car warms up.And this takes a while.Sounds like theres a damn huge camn in it.Now that its warmed up to 55 today,It reves up to almost 4000 rpm when I start it.I have to hit the gas to get it to come down.It still stays at 1500 untill it gets nice and warm.I know it always revs up for a few seconds but this is just weird.Has never done this before.Any ideas?

 

I had the same problem a week ago. all i did was adjusted/messed with the TPS and the problem went away.

 

Mine does it as well I would love some answers