The afm come with a voltage graph, but I forgot it when I was tuning my car on the dyno with my friend. Where are you located, most places in Australia have the software. All you need to do is set your injectors to the correct ratio in the injector settings, then i set my base fuel pressure around 5-6 psi above stock, then open up your injector map and set it to display air fuel ratio. All around idle set it to 14.7 (or near abouts) and you car wont idle it will be too lean. Just keep increasing the voltages around idle voltage until you have your desired air fuel ratio on the wide band, then continue through the rest of the map.
yes exactly the same, I thought there some something wrong with my car. The what I tested was I set my injector % completely wrong so that it would run extremely rich and adjusted up my fuel pressure and then it idled, then I realised it was the voltages that were not correct.
Mind you the voltages in most other areas are nearly fine.