That's the thing the internal calc stays internal and It's not fed to The ALDL datastream. Trust me guessing will be As accurate as trying to calculate based an incorrect formula from TPS voltage. Although If you go back and read what I wrote, you'll see that I suggested oobserving the TPS voltage along with knowing where your foot is.
Another part of the problem It's that you might be able get what seems like an accurate range on one vehicle probably won't be on another. The '7747 does not auto calibrate the TPS at start up like newer ECM/PCM do.
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