IAC problems
 

I think my IAC motor just went on me....
I had just gotten off the highway yesterday after doing 115 for about 5-10 miles and as soon as I would come to a stop at a light the car would just die. It starts up fine, but as soon as I put it into gear it just dies. I had it at the Firestone next to my shop and a friend of mine was doing all of the diagnostic checks and we can't figure a single thing out. It's not giving me any codes. All we can think of is the IAC is getting stuck...
HELP

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95 GT convertable, 3.73 gears,Catco Hi-flo h-pipe, Flowtech headders, Cobra intake w/ 65mm tb
GT40 heads, march underdrive pullies, Saleen wires, custom made cold air induction

That has happen twice to me. The first time, I did get the code regarding the IAC just remove it and clean it with Fuel injection Intake cleaner. I also used a can of compree air to help dry it up.
The second time I like you didn't get any codes. I did the cleaning but nothing, it still continue to happen. I then replace my cap, rotor, spark plugs, and wires. That took the problem away, i just hoped I had replace one item at a time to find out which was the problem.