ISproject

does anyone know which wire to hook the purple signal wire from the auto meter air to fuel ratio gauge to the o2 sensor and do i use the front o2 sensor or the rear one. they say its the high signal one but im not sure which one that is

itr206

Its not gonna matter much because its a narrbowband 02. All you are going to get is a pretty light show to be honest.
You can probably not even hook that wire up correctly and get the same result.

hockyplyer

hooking up a airfuel gauge to a factory narrow band is a waste of time. if you want the real readings buy a wideband. your can pick one up from aem for around 200 bucks.

Andrew