thank you sooooo much for posting that. :thumbsup: I just experienced the same thing on my 90. I had swapped out the throttle body (sticking badly) and the old tps didn't want to come off, so I just grabbed one out of the junkyard box to put on the new tb. sure enough, it was doing what you described. I never would have thought to remove the tps harness and try it again. :doh: nothing changed so I tried another tps from the box. this one works great. :) and now I'll be drilling the old tps outta the old tb so I have a good spare.
:cheers: