I saw a oxygen sensor testor in a Mid America catalog. Can you use this to check air/fule ratio while on the fly? Anyways what are the numeric numbers that represent each fuel ratio change. Is it in ohms? For example 12:7 to 1 ratio would be equal to what number in ohms when checking oxygen sensor?


1991 Z28 1LE 5.7 auto.

 

not sure if you've checked this or not yet, but this tech article might be of some help:

https://www.thirdgen.org/newdesign/tech/o2tuning.shtml

Eric

 

The stock o2 isnt much good for measuring things outside of the 'ideal' A/F ratio of 14.7:1. Its just not designed to work that way. A wideband o2 sensor is, but those are pretty expensive items. All reading the voltage off the stock o2 will do is give you a general idea of where you're at, it shouldnt be trusted as accurate.