O2 sensor and rich condition

[Bruce Plecan]

-----Original Message-----
From: Roger Heflin <rah at horizon.hit.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, July 28, 1998 9:55 AM
Subject: O2 sensor and rich condition


>Would it be possible for too much gas going out the exhaust to
>cause the O2 sensors to read high (950mv+) even though there
>was plenty of O2 there (miss condition)?   I am trying to 
>interpret my O2 readings and things aren't quite looking right.
> Roger


The term miss covers alot of ground.  ie ignition miss, lean miss,
fouled plug, bad plug wire, and the list goes on.
  So a "miss" can result in a high, or low O2 voltage.  Remember 
O2 is only part of the picture.  HC, and CO can change alot with
the same O2 voltage.
  Cheers
Bruce