rough idle

My 1998 Ford Explorer with the SOHC engine has started idling very erratically (between 500 and 1500 RPMs) when I first start it up in the morning, the erratic idle goes away after a few minutes. The check engine light isn’t on and it doesn't do this at any other time during the day. Any ideas would be appreciated.

You have a classic case of a bad or dirty/plugged up IAC (Idle Air Control) valve. It's a very simple part to change and you can pick it up at an autoparts store and install it yourself. Here is a site with full instructions: http://www.fixyourford.com/wontidle.html

Good luck.

Maybe yes, maybe no. Could also be lower intake manifold gaskets.

Cleaned out the idler air control valve, no problems since.
thanks

Glad to hear it. Have fun.

its good to clean the IAC every once in a while,

along with the MAF sensor as well