I just wanted to add that sync'ing your wide band reading into TunerPro is vital to the operation of closed loop wideband. Since I have had so many problems keeping my Zeitronix sync'd I thought I would share my method.
At an idle, I force open loop using the "Temperature for closed loop enable" set at 150 degrees C. This stabilizes the actual AFR since the ECM isnt trying to adjust it. Then I open my WB software, and set its screen size so I can see both the actual AFR TP value and the WB software value. I open the WB scaling window and get ready to adjust. Then I adjust the VE #'s while running at idle to achieve an entry into the WB scale. As an example- 2.66v = 13.7 AFR. Usingthe VE table to force an actual AFR of 13.7, I then read the WB software's reading and re-enter that into the 2.66v field. Do this for a few values, and smooth them in between or just keep forcing and adjusting until both readings match. Use caution idling and extreme rich or lean conditions. I try to work fast, then return to normal idle values and let things normalize before resuming.