97 Explorer High Idle

Noticed that the vehicle idles much to fast after starting, and continues to do so for a couple of minutes. Very dangerous in slippery conditions if you don't wait till it slows down.
What is the cause of this? Vacuum leak?

I have owned many EFI vehicles and after the first start and idle of 10 secs or so, it goes back to a slow idle regardless of the temperature.
Any thoughts?

my experience with my 97 is that I had #2 spark plug half out and #3 spark plug had come almost completely out. Another time My throtle positioning sensor went out. My throttle body stuck because it had to be cleaned.

my experience with my 97 is that I had #2 spark plug half out and #3 spark plug had come almost completely out. Another time My throtle positioning sensor went out. My throttle body stuck because it had to be cleaned.

Thanks for the info. I will check the plugs for sure. Seems to be missing a bit as well. I already cleaned the throttle body or the idle control valve, but that didn't seem to do the trick. Want to avoid the costly shop visit.