I don't know if this helps, but I found this at Promustang.com. It tells you how to check your TPS voltage, and adjust it. But I think it's for a 5.0. Our 4.6 is a little different looking, but maybe this will help.
http://www.promustangs.com/tps.html
Good Luck!
[This message has been edited by T-Bone (edited 04-19-2000).]