Also... adjust the idle screw, screw it in some until it starts to idle by itself.
I fixed the CHP Museum's mustang that way. It had the same problem as you are having.
It was screwed all the way out.
Put a newer TPS on it, adjusted it and the idle screw.
Ran perfectly after all of that. A little throttle body cleaner, adjust the TPS and the idle screw. See what happens.
Best
__________________
John
1992 CHP #E895201
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