air/fuel hook up to O2 sensor on 91

[winreboot]

I just need some help with getting the right wire to hookup to O2 sensor.

There are 2 O2 sensors. Front and Rear O2 sensors that hook in to Gray C157 plug (22 wires) to ECM.

Front O2 sensor has white and green wire (pin18) on C157. Rear O2 sensor has white and green wire(pin19) on C157.

My question is do I cut in to Front O2 sensor or the Rear O2 sensor?
And witch wire do I cut into white or grean?

I want to get a Haltech or Automeater Air/Fuel gauge, after installing wet 80 NOS.

Any help appreciated

Thanks,

 

[winreboot]

Anyone ?

 

[snyper2727]

Based on my own personal experience, don't even waste your time trying to get an accurate reading off the stock O2 sensors. I had an Autometer, and they bounce around so often and so fast you won't know what the hell the reading is. Colsed loop, open lopp BLAH BLAH.

If you want an accurate reading purchase an FJO Wideband system for around $1200.

Anything else is COMPLETELY wasting your time, believe me I have been there.

From one NSXer to another...

Justin