Quote: Originally Posted by
ojcool 
A narrowband 02 sensor cannot read this range, sometimes when a a/f ratio is WAY outside the range of a sensor it has the nasty tendency to peg Pig RICH even when it's actually a lean condition. I don't need to tell you what this would do to your a/f ratio.
all O2 sensors, even wide bands read Lambda not A/F. Widebands just do it differently and then the A/F is just a conversion
you tell a guage to make.
E10, E85, E20, M85, Petrol, Methanol, diesel, keroseen, jet fuel, Propane, Nitromethane, Natural Gas, Wood, what ever, will ALL be read by any O2 sensor as lambda = 1.0
when the mix is stoich. For a narrow band O2 it will pump out .45 volts. Now everyone listen carefully,, this is the tricky part: If you have a wideband with a Gauge SET BY THE USER to OUTPUT LAMBDA = 1.0 = A/F = 14.7, then ALL THE FUELS, WHEN LAMBDA = 1.0, WILL READ AS 14.7 ON THE GUAGE REGARDLESS of WHAT THE TRUE A/F IS!!!
If you change the guage so that Lambda = 1.0 is = to an A/F of, lets say some thing crazy, 45:1, then for
ALL fuels when the mix is at stoich will read at 45:1. Now is the A/F
really 45:1?? Of course not.
A guage's interpretation of Lambda is all relative to the USER and NOT a function of the O2 sensor.
