My idle (now monitored) goes up and down, not on its own.. if I give it gas, the idle remains high after the foot is removed. To get it back down, I have to give the pedal a quick tap and after the idle goes up, it goes back down to normal. I have checked the TB for gunk, and since it was recently cleaned, this doesnt seem to be the cause. Is it my TPS? any other ideas?

please help me out here.

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88 4runner 22re 5spd 30x9.5 bfg AT
daily driver - weekly off roader.
284,400= Jasper - hello 5th gear!
true Thorley Header - V6 3rd
Valid inspection sticker (289,000)