97 Explorer High Idle

[Robobru]

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?

[chr97]

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.

[Robobru]

Originally Posted by chr97

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.