O2 sensor question

[Dave & Irina Eicher]

Thanks Grumpy,

That helps a lot, didn't realize how worthless the narrowband sensor are.
There would be no point in trying to build an A/F meter using something like
that. Does anyone have any idea where a good wideband sensor can be
purchased at the lowest price?

thanks,

dave

----- Original Message -----
From: nacelp <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, March 21, 2000 8:47 PM
Subject: Re: O2 sensor question


> All, the gm O2 sensors that I know of are "switching" ones, meaning they
> have a very high slew rate.  They are basically meant to read less than,
or
> greater than .440 volts, depending if rich or lean.  Tring to interpolate,
> them, to do more is not very accurate.  They degrade with age, and are
> temperature sensitive.  Only a true Wide Band O2 sensor is meant to read
> other then as a switch much lower slew rate.  There is a ton of info about
> them in the archives.  Some testing I did here at home suggests to me they
> aren't even truely O2 sensors.
> Grumpy
>
>
> > Hello,
> >
> > What is a switching O2 sensor? Never knew there was such a thing. I'm
> > interested because I'd like to build a simple A/F meter myself.
> >
> > thanks,
> >
> > dave
> >
> > ----- Original Message -----
> > From: nacelp <nacelp at bright.net>
> > To: <diy_efi at diy-efi.org>
> > Sent: Tuesday, March 21, 2000 4:04 PM
> > Subject: Re: O2 sensor question
> >
> >
> > > Are you sure you need to add one?.
> > > You do realize using a switching O2 sensor isn't the most accurate way
> to
> > do
> > > things.  They degrade with age, and output varies with EGT.
> > > Bruce
> > >
> > >
> > > > I am dropping a new motor in my '91 240SX this weekend and I am
> looking
> > to
> > > > install a second O2 sensor to drive my A/F meter.
> > > >
> > > > Can some one tell me the pin out for a 3-wire Bosch sensor?
> > > >
> > > > Thanks!
> > > >
> > > > Scott Bowen
> > > > Bastard Motorsports Engineering
> > > > Houston, TX
> > > >
> > >
> >
>
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