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Old 06-15-2019, 10:08 AM   #4
trevarthan
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Join Date: Mar 2014
Location: Chattanooga TN
Posts: 121
Re: Spark Plug reading

Quote:
Originally Posted by HO455 View Post
Unfortunately in these modern times of ethanol gasoline, every brand having a different mix of additives, and the change in fuel mixtures for the different seasons of the year, being able to read a spark plug with any kind of accuracy is impossible. If you were to run only straight AvGas then you would be able to read a plug like in the days of yesteryear.
On the up side of these modern times we now have wide band O2 sensors and the ability to read air/fuel ratios on a guage with far greater accuracy than what you can get by reading plugs. For example:

http://67-72chevytrucks.com/vboard/s...d.php?t=713728
This is the first time I've heard anyone say this. Do you have any data to back up this claim? I'd like to know more.
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