Is this correct?>>......

Black = Signal wire
Grey = Common
Whites = Heat

If so shouldnt my AFR guage splice into Black?

 

AFR gauges that work off a narrow band 02 sensor are a HUGE waste of time. If you want real AFR readings buy a wide band setup that will come with a wide band 02 sensor.

 

I kinda figured... The car had one in it when I bought it. Its a pro comp guage, and it always reads full rich. It has only one wire going to the sensor in the cat.
Ill upgrade.
Thanks for the input.,
PS.. Impressive 1/4.

 

Yeah they do that since they are really meant for NA cars, so anything richer then 14.7 is going to show as "RICH" on that gauge.

Thanks