effect of leaded gas on wideband O2?

[Bruce Plecan]

----- Original Message -----
From: David A. Cooley <n5xmt at bellsouth.net>
To: <diy_efi at efi332.eng.ohio-state.edu>
Sent: Tuesday, April 13, 1999 9:09 AM
Subject: Re: effect of leaded gas on wideband O2?

Ya but the Holdens used O2 sensors in New Zeland the whole time.
The Saudi sy's had an O2, they snipped the wire thou.
There are some posts in the archives, where people have exported cars to
countries using leaded fuels and did just fine.
Bruce


> Actually,
> The Export models of cars that are destined for countries with leaded
fuels
> have the PCM's calibrated to operate with no O2 sensors or cats.  As an
> example, the Export exhaust system for the impala SS is an H pipe from the
> manifolds down to the intermediate pipe that replaces the cats and has no
> bungs for O2 sensors... The Saudi Syclone/Typhoons were the same way... No
> cats, no O2 sensors.
>
> -----Original Message-----
> From: Bruce Plecan <nacelp at bright.net>
> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> Date: Tuesday, April 13, 1999 9:03 AM
> Subject: Re: effect of leaded gas on wideband O2?
>
>
> >
> >----- Original Message -----
> >From: greg kring <summit01 at nationwide.net>
> >To: <DIY_EFI-Digest at efi332.eng.ohio-state.edu>
> >Sent: Tuesday, April 13, 1999 1:19 AM
> >Subject: effect of leaded gas on wideband O2?
> >
> >Now bear this in mind that this is just personal theory, and I have
> >absolutely no doumentation on it.  But:
> >  Up until the last year or so Some countries were using only leaded
fuels,
> >with O2 sensors.  So the issue of being leaded, is void, in my book.
> >  The US and some other countries have outlawed unleaded for street use,
> one
> >way to make that law totally enforceable for late model cars is using an
> >additive that kills O2 sensors.  Which also explains some of the secrecy
> >about what is in the gasoline we buy.
> >  Also, explains way there is such a large opinion as to O2 life.
> >  The WB O2s all seem to be heated, and I just wonder if that helps
reduce
> >stuff from accumulating on the sensor during warm-up, which might be what
> is
> >actually killing the sensors.
> >  One of the designers of the Fel-Pro unit used to/might still subscribe
to
> >the GN/Ttype list, just be sure to mention Buick V-6 in your post....
> >Bruce
> >   Sneezy's in trouble again.  Was a Hooters and thought he saw an owl
move
> >under one of the gals shirt.  He tried protecting here, and some how got
in
> >trouble for that....  Just doesn't pay trying to be a good samaritian
> >
> >> I know leaded gas will poison a standard oxygen sensor, but what
happens
> >> to the UEGO wideband sensor under repeated use with leaded gas? Most of
> >> the racers I know just leave their standard sensor in at the dragstrip
> >> using leaded gas, then switch back to unleaded for the street. When the
> >> sensor goes bad, about once or twice a year, they just replace it. Easy
> >> to do with a 30 buck sensor, not so with a high dollar wideband. The
> >> whole purpose of the wideband on my Fel-Pro system is to tune at wide
> >> open throttle, which happens at the track with 116 octane leaded gas.
> >> Any ideas on life expectancy? We are talking 5 or 6 passes down the
> >> track, then back to street gas all week.
> >> Greg Kring
> >> Arlington, Texas
> >>
> >
> >
>