I have read a few articles on that as well but wasn't it determined to be not reliable with most all of the non flex fuel PCMs.
If I recall correctly, the Ethanol fuels can trick the O2 sensors and therefore the Long and short term fuel trims.
That was the conclusion right?
98 tigershark
Quote Originally Posted by Chevy366 View Post
Didn't someone else explain how the newer OSs use STFT to detect Ethanol and make changes in the tune rather than using the sensor , think it was in the same thread .