Adding another O2 sensor

[Bruce Plecan]

They are the ideal way to do what they are meant to do.
In the archives are a ton of messages about O2 workings and strategies.
Bruce



> I kinda started drawing the conclusion that they were indeed pretty good
> when switching.  It's a rather clever solution to get a non-ideal product
to
> work, and work well.  I've been banging on the list about AFR and O2
> inaccuracies thinking that my car is lying to me.  Still investigating.
> Went through all my Diacom data since day 1 and the calculated AFR is
> consistently 12.5:1 +/- 0.3.  The interesting thing is the calculated AFR
is
> gradually rising as the gas mileage also rises.  I'm going to attempt this
> weekend to do the same highway test on my friend's bone-stock IROC (with a
> new MAF sensor.)
>
> Still playing!
> Steve
>
> -----Original Message-----
> From: Bruce Plecan [mailto:nacelp at bright.net]
> Sent: Friday, November 03, 2000 2:33 PM
> To: gmecm at diy-efi.org
> Subject: Re: Adding another O2 sensor
>
>
>
> They are at least as fast if not more so then the oem ones.
> Remember the ecm is shooting for a 14.7:1  AVERAGE, do it hammers things
> real rich and lean.
> The oem one's ******errors****** is when folks try to read them as a WB.
> They develope cross counts at the same rate as the oems, from what I can
> see.
> At the Powwow we had a scope on the WB and you could see the individual
> cylinder firings, and how they swung rich lean.
> Bruce
>
>
>
>
> > Any comparisons to a wideband to show how GOOD they are at measuring
> 14.7:1
> > in switch-mode?  Are they extremely good at it, or still full of error?
> > Steve
> >
> > -----Original Message-----
> > From: Bruce Plecan [mailto:nacelp at bright.net]
> > Sent: Thursday, November 02, 2000 12:40 AM
> > To: gmecm at diy-efi.org
> > Subject: Re: Adding another O2 sensor
> >
> >
> > IF, all your doing is reading side to side for 14.7:1 comparisons, Sure
> why
> > not.  The oem  sensors are of a switching type.  They are not meant to
be
> > WBs.
> > Bruce
>
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