Anyone have or know anyone who has one of the smart chips from VOLO? Here is the link:
http://www.voloperformance.com/fuelsaver.html
actually it's only the latest generation 5-wire o2 sensors that use the outside air... all other prior generations have a container of air inside the unit to compared to...
here is the thread I did about the way o2 sensors work... got all the info from the manufacturer...
http://www.hhoforums.com/showthread.php?t=1428