Alrighty... TPS is on the side of the Throttle body, If you have a PCIII or even if you dont.. I'd recommend that you check the wiring ont he top. maybe tap it a few times w/ a blunt object and try it again.
If that doesn't work... do you by chance have anyone w/ a raptor that lives near by? Might be woth trying a different working TPS to see if yours is bad. I know I've heard about a few people that have had them go bad on theirs.