I have the AEM wideband hooked up on my Supra. I am using the 0-5v output wire on the wideband connected to a volt meter to view the AFR. My problem is that I need datalogging !!! I had an idea I think it might work, so i figured I would ask.. I came across some DIY wideband logging software, what I wanted to do was instead of having the volt meter hooked up to the 0-5v output on the wideband, to get a laptop, load the DIY logging software, get a serial cable, cut the one end off and try each wire on the serial cable to the 0-5v on the wideband until it displays on the laptop screen, then add your RPM signal to the cable and do it like that?? It may sound a little complicated but id like to figure it out !