I hope I am not hijacking this thread, but I have the exact problem with my 92. I intend to check into the IAC valve.
My question is this, since I don't have a garage and it is cold outside, can I just live with the problem until it warms up this spring, or should I deal with this now? Will the valve go bad and strand me somewhere? It runs and idles great, once the truck warms up a bit, and I can live with this the way it is for a while. p.s. this truck is not a daily driver, just use it 2 or 3 times a week.
Dan