Thanks Shadowman. How would you know if your running lean or rich ?
What ????; and yet there are no dumb questions; thank you for asking.
The number as evidenced on the gauge is the a/f ratio as being received from the wide band O2 sensor; there is no baseline number to which a number is added to or subtracted from the number as seen on the gauge.
Please let me know if you have any addition questions.
Takes care
Shadowman