Ok, i got my Autometer A/F gauge in today, since it was used, i was in a hurry to install it. There are 3 wires commin out the back: RED, BLACK, GREEN. I read tutorials on everything you would want to know about how to install and how they work. So my problems:

Currently it is hooked directly to my battery negative and positive. The O2 wire is wedged in the clip on the GREEN wire. (My o2 sensor has white, green, and 2 black.) Im pretty sure this simple hookup should work.

When i hit the brake with the car off, the first light on the left lights (like it power spikes) for a sec.

when the car is started, durring starter turnover the lights bounce from lean to rich and back then go off. While the car is idleing they stay off and slowly I get a few lights lighting on the rich side.(Mind you the turbo is not on yet).

I was told the gauge only lights 1 light at a time. This is lighting about 4 on the lean(left) side but very dim. As I drive it stays about 4 or 5 lights dim on the lean side. When on WOT nothing changes which I beleive should go to rich normally.

My questions:

Do I need a seperate/wideband o2 sensor as well? Can I just run it off the signal wire from my stock 02 sensor? Could the "power spiking" be caused because I have it hooked directly to my battery?