02 readings, Intermittent lows

[Brad Bartilson]

Looking for feedback on 02 readings. I get periodic (every 10 or so frames) 02 readings that are very low, e.g. < 10mv. The rest of the time the readings are normal, 300-800mv. Is this normal? BTW, I've tried numerous Bosch 02 sensors (which were very inactive), and now have a GM sensor (much more active), but still puzzled over these periodic low readings. I use Turbolink. Still looking for emission culprit.

-Brad 87TR

 

[gofstbuick]

What kind of chip and when does this happen? The reds 93 drops O2s really low during deceleration. Otherwise the reading are normal.