Sorry. I just realized I did not ask the question properly. The question should have been:
Does the butterfly shaft of the TPS side TB have a seal at the bottom? Sealing the TB shaft from the rotating part of the TPS?
Like and old 1 barrel carb on a car. The butterfly shaft just rides in the carb casting, No seal. When the casting wears, it can become an air leak around the butterfly shaft.
With the TPS at the bottom of a vertical butterfly shaft on the TB, maybe that is how the TPS gets contaminated by gas or whatever.
Thank you and again sorry for not asking the question correctly,