So today I go out, hop in my car to go get lunch. Turn the key to prime my fuel pump and let the wide-band heater do its thing.

After it was done, it gave me a lean reading, "22.4" and stayed stuck there. I took off anyways, got on the road and when i would get off the gas it would read really rich "7.4" and then switch back to "22.4" when i would get back on the gas.

Fuel type I'm running on this set up is pump E85. Before this, my afr gauge has worked flawlessly. Thoughts?

TIA.

 

has the gauge settings gone back to stock petrol afr

 

check the gauge settings....sounds like the output is acting like a narrow band sensor.

 

Probably the sensor.