After driving and putting car in park the idle runs higher than normal.

What is your question?

It happens almost every time after driving. The idling seems to go higher. I'm sure it's affecting my gas mileage also. I looked in YouTube and saw something called an idle air control valve, and wondering if that may be the problem. Just looking for other answers that may be of help. Thank you

How long has your 1994 Ford Tempo had this problem?

4 months