Originally posted by RfOeCnKdOeNr

Originally posted by Tired2 There is some good info here: http://www.msextra.com/forums/viewtopic.php?f=101&t=45400 I think you can 'calibrate' it, but you should not need to if you know it is a good GM sensor. I'd guess wiring. Did you follow the guide for proper grounding and bring all the sensors back to the MS unit instead of just wherever they land?

By the way... for those of you following this thread and for future reference. The temperature issues I was having were because I never set the sensor types in Tunerstudio. Everything I read says GM is the default but I still had to go to "Calibrate Thermis..?" in Tunerstudio and select the GM sensor for both the IAT and Coolant sensors. Fixed my temp issues right away.

Strange, I never had to set mine, maybe your settings got removed somehow. .. Or maybe I did, I dunno.

As for testing the wbo2, you can mount it in the tail pipe of another car, you could rig up a mount of some sort to get it in there just a bit... but I'm not sure why it would really ever output 5.8v on the analog. If that is the case, there is almost definitely something wrong. All they really do there is bring the reading in analog, condition it a bit maybe, and use a digital-to-analog output on some microcontroller to output the AFR value scaled to 0-5v.