[Super Doody]

I have S/C 2001 4x4 3.4 taco, california truck, 2 cats, 2 O2 sensors. On the Autometer Air/fuel ratio gauge, where does the PURPLE wire (to sensor) attach to????Where in the wire loom. I've attached the red wire to ignition source and the black to ground..HELP!!!!!!!.

I concurr...those narrow band afr meter worthless. Dont even try to tune with it will be impossible. I would return it and get a wideband tuner. If you want a guage thats mounted in the cab some where, there are adapters you can use for mounting a analog guage to use in conjuctions with the wide band. Check out the URD website. AEM has one thats reallly nice but its around $450 but it can data log comes with 9/16 guage I believe which is that same size the trd and autometer gauges.