I found the Ambient Air Temp Sensor! 2008 ProStar...

[Waterloo]

Honestly, after talking to a good friend of mine, that is a mechanic, and now a salesman for International, I would move the sensor. There was a noticeable difference in my truck, but I did several things, no programing, but stuff. In hindsight, the one major thing I did, was moved that sensor. I cannot believe the other thing I did with the cans made that much of a difference... The truck runs much better as of now. Granted, I only drove 8 miles round trip to get some Camels and some beer... But this was not the same truck I pulled into the driveway last week.