94 3000GT idle problem, stalling

Engine starts and drives okay for awhile until it gets warmed up good. Then it will die at stop signs. It will start right back up but you have to give it gas to keep it running. Can't put into gear and go,dies.(automatic). Service engine light doesn't come on. after it cools back down you can take off and go again for awhile. Any suggestions will be greatly appreciated.

IAC is dead or dying.

Thanks for the help!!!