It's good to hear that it's probably not the TPS which would make sense because the hesitation would occur all the time and not just when the engine is cold. This all leads me back to bad oxygen sensors which I think is the problem.
I would replace thermostat , and see if problem persists.
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I'm going to start soaking the oxygen sensors with penetrating oil for the next week or so. Hopefully I can break them free in one piece.
1988 Lxi owner since August 1995
336k miles running strong!
Now running E85.
My Acura Type R front brake thread