Mine's having the same problem right now. I'm trying to find the idle up adjustment for the A/C. Someone said it was under the dash behind the glove box I believe but I can't find that thread! <img src="/forums/images/graemlins/angry.gif" alt="" />

Basically, when the A/C is turned on the RPM's will drop if it's cold. I can give it gas and the idle up tries to increase the RPM but drops back down and runs rough. If I switch the A/C off and then back on, the rpm's will drop back down and run rough again.

Once it warms up the idle up will kick in and keep the rpm's up as long as the A/C is on.

See this thread also...
http://www.4x4wire.com/forums/showf...mp;amp;sb=5&o=14&fpart=1