Quote:
Originally Posted by 68Vette
Without sounding like a noob, why do you have to do a re-learn, can't one simply disconnect the negative post of the battery before installing and once finished reconnect and it's good to go?
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What Z0tex said, and let me add that even if you change a stock TB by another stock TB, the shop manual instructs you to reset the ECM TB learned values, and do the re-learn for the new one.
Experience shows that it is not strictly necessary, most times it works just fine and when it doesn't it is not catastrophic. You might get a temporary code that you can erase and should not show up again or a little rough idle that it should learn in a few starts.