there are four ports. One is a ground and the other three are positives (1,2,3 which would be the 1,2,3 AD inputs under the gauges selection. The only thing you will need to figure out is how to make the powrtuner show the input as an afr. It will show up as a voltage just like the O2 sensor. Here is the info I used to make my wideband show up as an afr. I got it from the powrtuner site.
Right click on the gauge showing your A/F voltage and add a formula to what is there. Basically the span of your wideband divided by 5 plus the lowest reading your wideband can go. eg. mine can read 7.35 to 22.39 AFR. (22.39-7.35)gives span of 15.04. 15.04/5=3.008 so every 1 volt change represents 3.008AFR. Add on the 7.35 bias(that's my zero volt AFR) and you're there. There will be some numbers there already like N51/something or other. I don't remember what exactly. Don't change that, just add the formula to the right in the proper algebraic order. N51/whatever*3.008+7.35 in my case. At zero volts out you get (0 * 3.008) + 7.35 = AFR of 7.35. At 5 volts out you'd get (5 * 3.008) + 7.35 = 22.39 AFR or full scale. "()" aren't needed when you enter the formula. If you need to tweek it for voltage losses and the like fudge the multiplier as needed. If I tell my WB to output 5 volts and check it with my fluke it's 4.9 something so I have to make allowances.
