Fuel Air ratio guage

[scmscout]

My fuel air ratio gauge is all over the place, running steadily on the freeway or idling at a light it goes up and down from about 13.8 to 14.4, probably about once every second. Is this normal?

 

[2012Boss302]

not to sound like a smart ass but, probably. Odds are the gauge is getting its readings from the A/F sensor which is shifting constantly unless under power......

 

[FLGator]

I certainly hope it is normal. Mine posts the same readings.

 

[scmscout]

Thanks for the conformation, just wasn't sure.

 

[CrossBoss]

My fuel air ratio gauge is all over the place, running steadily on the freeway or idling at a light it goes up and down from about 13.8 to 14.4, probably about once every second. Is this normal?

A varying O2 sensor voltage is usually what causes the a/f to be changed/ing via the ecm. Some "hunting" is expected due to constant changes in air temp, humidity, altitude, fuel variances, throttle position, rpm, sender and gauge variances