Well I tried my first datalog with the Tweecer RT today. Everything seemed to work ok with the Tweecer/CalCon and I got a couple of 2 minute runs logged. Mostly just idle with a few seconds of 2-3K RPM. The car has been running rich so I looked at the HEGO's to see what they were saying. HEGO1 seemed to be reading normally, bouncing up and down around .5 but HEGO2 did not appear to be doing anything. It was staying at the bottom of the scale. Voltage was almost 0 on this sensor. This would indicate very lean to the computer and cause it enrich the fuel to that bank, correct? I hooked up my LM-1 wideband to that bank and it was reading around 12.5 and would drop to about 10.5-11.0 when I gave it some gas. KarmF2 was reading 11.3 which means the computer is commanding more fuel, correct? So I am guessing that the O2 sensor is not working or not working correctly. I am looking for some feedback on if I am analyzing this correctly or am I missing something. I don't have much more time today to play with the car, so tommorrow I think I will check the connections on the O2 sensors and maybe swap them to see if the problem switches to the other side. I will probably just break down and get a couple new O2 sensors anyway.