Updated to this on going issue.

After replacing the IAC valve everything was running fine for a couple of weeks. Now all of a sudden the idle is running low. If starting the car in cold weather the car will not even stay running. The idle is around 400-500. I need to keep my foot on the gas and keep the idle up to 900-1000 until the engine warms up a bit. Once the engine is warm it will idle at 725-800 which is still low.

Suggestions?