I am having problems with my new WB sensor. When I first got it, it was working OK, or so I thought. This is my first car and first time, but I have to do a "free air" calibration every time I unplug the power wire. Otherwise it will show an AFR of over a hundred. It will then show an idle AFR of around 20, which is suppossed to be the free air reading. I cannot find a place for any kind of battery backup. I just took it for a test drive to log my VE map, and got back to the shop, copied and multiplied my maps, then went to do another drive, and in less than 20 minutes, it has lost its calibration. I pulled it on the rack, recalibrated in free air, reinstalled the sensor after unplugging the controller, then turned it back on and started the engine, an it is wacked out again. How does this thing store its calibration? How often does it have to be recalibrated. This is ridiculous.
Thanks for any advise.