I have a new build and I am working on getting the o2 sensors to work right. I have fueling real close with the wideband, but I have the o2 sensors in there so it would be nice to have them doing something. I figured at first that the o2 sensors might have been bad, so I replaced them with some from another vehicle I have which I know were good. They are working for a while until the coolant temp got up to like 120 degrees. I have stft just enabled in open loop. At the 6:10 mark stft stopped working and just a little later the o2 voltage goes to .447. Anyone have any suggestions? thanks