Funny Oxygen Sensor Readings

[John C.]

o2 sensors are anything BUT linear...  that is normal

----- Original Message -----
From: "Bob Cunningham" <bobc at shell2.tiac.net>
To: "DIY-EFI" <DIY_EFI at lists.diy-efi.org>
Sent: Sunday, May 28, 2000 9:01 PM
Subject: Funny Oxygen Sensor Readings


>
> Hi, I'm new to the list.
>
> I am trying to do some tuning with my system, and having some weird
> readings from my Oxygen sensor.  When the engine is running slightly rich,
> voltage stays about where I would expect it, around 600-700 mv.  However
> when I lean it out just a smidge, instead of the reading going to 500 or
> so, it takes a nosedive down to about 70-80 mv, with maybe a stop around
> 200-300 along the way (but doesn't stay there very long). I would think it
> should act more linear.
>
> I am used to a sensor being slow to react (lazy) when it goes bad, could
> this be an indication of some other problem like a header leak?  I would
> think is should still act more linearly...
>
> TIA,
>
> -Bob Cunningham
> '69 Buick Special w/ 455
>
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