"O2" To check or not?

[geno]

when i down load a map from tuneecu do i need to leave the O2 checked or unchecked; I have my oxygen sensor down by my exhaust plugged off. "please help because my idle has a slight up and down rhythm!

 

[dougl]

Where is the sensor? Uncheck it and if you already haven’t, disconnect it under the right side cover.