[Bad89stang]

Thanks to everyone that helped on this one. It took a combination of a few words of wisdom to fix it. Here's how it was done:

1. Reset the idle screw on the TB by returning it to the factory setting. (Thanks Jim)
2. Set the TPS voltage (Thanks Chris and a few others)
3. Reset the computer (Just drove it to work and back 80miles)

The person who owned the TB before me had adjusted the idle screw way too far from the factory setting. My TPS was never the problem, but with the voltage correct I was able to eliminate it. The TB and IAC were only a few weeks old so they weren't dirty. Now it idles rock steady and returns instantly to idle when I push in the clutch when off the gas.

By the way, my father-in-law got a Ford Service Manual for his mustang off of Ebay. Everyone should have one of these! 99.9% of the car is covered. COMPLETELY. If you need to know how to do something, just look in there.

Thanks everyone