I just installed my air/fuel ratio gauge, I did it just like the forum said. I used the o2 sensor that is inside the cat, out of the four wires in the sensor, there are 2 white, 1 gray, and 1 black. I used the black one, because it was the signal wire that I was told to use. I turned my car on and the gauge stays on rich. I just stay there even at idel. I think it mit be the o2 but i heard if its bad it goes to lean and stay. The only fuel thing i have is a adj. map clamp and i turn it to lean and it stay at rich. Need your help asap email me
coolcat34113@yahoo.com or call me let me know 574-780-5580