SlowTeg

I'm having a strange problem w/ stock oxygen sensors.. The one I currently was using just seemed to stop working after a little over a month. It registers once ina while on the a/f meter, but alot of the time it just is blank..? I was thinking that maybe I'm running overly rich but I tuned it and the a/f sits around stoich under low throttle and in the 11's in boost..? Anyone seen this problem? Maybe the o2 just happened to go bad? All the wires are fine I just checked it. I cleaned it off, so we'll see what happens.. Thanks for the help.

-Mike