This being a 92 360, it should not be a magnum, 92 360 was TBI yet, Look on the drivers side of the of the throttle body there is a motor with a plunger, have a helper turn key off and on, this should move the plunger in and out, if it does not, you most likely need a new idle control motor, these were bad failing .

Originally Posted by Grizzly
Could be the idle air control.

Helpful video here: Video

I have to give a mention to this Guy on Youtube, "Splelunkerd" that his 2nd Gen Ram videos are the best I've seen. He gives really clear instructions, lots of common sense style repair tips, and is smart as hell; worth subcribing or favoriting in your browser. twocents

This Fellow takes the whole thing apart, but I just pulled mine out from the back, cleaned it with brake cleaner and was good as new.

Usually, Rhino if it's the IAC the idle will wander when it's cold. Hopefully, this is what your issue is (free fix up)