Installed air/fuel ratio gauge.... confused about what it shows

[speedingpenguin]

Installed an Autometer air/fuel ratio gauge in my Daytona tonight....
A bit confused. Just driving around like normal, it doesnt show any lights at all except once and a while the bottom few "lean" ones come on. At full throttle its all in the green "Rich" area, and at idle it stays right around the first two green lights....
What does this mean? Should I replace my o2 sensor? I'm a broke college kid so wideband o2 is out of the question for now at least. Thanks
-Chris

[shlbyZ]

at idle it should be bouncing around going from lean to stoich to rich, under WOT throttle and under boost it should be green(rich), on decel it should be lean.


check for a shitty connection from the o2 signal wire.

[cawcislo]

What year car, is that a 3 wire or 4 wire oxygen sensor in the car? Double check the grounds. How old is your oxygen sensor?

[XxPichulonxX]

It should bounce around when revved and normal driving. In cruise it should stay lean or stoich (depends on the car), WOT should be rich, and idle should be lean. This is at normal temp of course. On a cold engine the O2 sensor is ignored because it's not hot enough.