which 3 wire O2 sensor ?

[Bruce Plecan]

-----Original Message-----
From: Quinton McCombs <quintonm at bellsouth.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, September 22, 1998 8:52 AM
Subject: RE: which 3 wire O2 sensor ?


>This is mainly on the same subject but a little different.
>Are the various O2 sensors 1, 2, 3, 4 wire all interchangeable as long as
>it is wired correctly?  It seems that they all put out the same voltage in
>the same situations from what I have been reading.  My car has a one wire
>O2 sensor which runs for around $130.  Since it has 100k miles on it, I am
>looking to replace it.  Granted, I know it needs to fit properly but my
>first question is the electrical compatibility.

First general rule is that they screw in using a 18mm threaded hole.
Toyota, and maybe a few others used a resistive type sensor.
Then there are the wide ratio ones, but usually they are 5+wires.
Using a DVM if it generates a .1 to 1.0v (approximates) then
you have a "normal" one.
>
>Also, what is the difference between a normal O2 sensor and a wide band
>version?

FWIW, the normal one is not compensatd for EGT so .8v might
mean anything from 11.5:1 to 12.3:1.  Same thing on the lean
end of the scale.
Cheers
Bruce          Doc was dictating this material, and I was just typing
                    so blame him for any inaccuracies..
        
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