Just got a used A/F Gauge and seeing if anyone here has installed one on Evo 8. There are 3 wires on mine 1 wire is power and one is ground and the other is for O2 sensor. On the one that goes to O2 sensor which wire do I use off the O2 sensor?

 

Throw it away and get a wide band.

 

White Wire Got It

 

Sounds like youre installing a narrow band, do your evo a favor and get a wideband

 

Get a wideband. Your hate yourself down the road for not going with it to begin with.