[Shotimes] Oxygen Sensor Question

[Leigh Smith]

Someone correct me if I'm wrong, but I'm under the impression O2 sensors are
changed much more often than necessary. An aged sensor should have almost no
effect on steady state cruise, or emmisions, unless poisioned or obviously
broken (codes). (My 280K SHO still passed NJ emissions with original cats
and original O2 sensors and 28mpg)
Has anyone ever had new O2 sensors change emissions or increase gas mileage?
Where the sensor had not obviously failed(codes)?
The impression I'm under is that an aged but not yet failed O2 sensor would
cause a part throtlle "power" application to go very slightly lean, possibly
affecting power and mileage. But how much? Noticably?
Anybody confirm this?
Lee
----- Original Message ----- 
From: "Kenneth Epperly" <epperly1@optonline.net>
To: "SHO Times" <shotimes@autox.team.net>
Sent: Saturday, November 20, 2004 5:43 PM
Subject: Re: [Shotimes] Emissions question


> Yes this is what info I am looking for. There is no miss, has a new Y-pipe
> also need to check water temp and scan for any codes. Might change O2
> sensors if nothing else shows up. this is NJ also.
>
>         Ken
> ----- Original Message ----- 
> From: "Leigh Smith" <leighsm@comcast.net>
> To: "Kenneth Epperly" <epperly1@optonline.net>; "SHO Times"
> <shotimes@autox.team.net>
> Sent: Saturday, November 20, 2004 5:06 PM
> Subject: Re: [Shotimes] Emissions question
>
>
> > I'd assume misfire & lean. %CO goes to zero, NOX skyrockets. Curve? is
> > almost straight up. Too much heat.
> > FYI, my all-new 1200 mile SHO engine just passed at 662 ppm NOX, 11 ppm
> HC,
> > and 0.10 %CO on NJ state chassis dyno.
> > :-)
> > Lee
> > 94 MTX
> >
> > ----- Original Message ----- 
> > From: "Kenneth Epperly" <epperly1@optonline.net>
> > To: "SHO Times" <shotimes@autox.team.net>
> > Sent: Saturday, November 20, 2004 2:41 PM
> > Subject: [Shotimes] Emissions question
> >
> >
> > > As I frequently go brain dead and do not remember what is out of
> > adjustment. 92 SHO NO2 way high 1000 ppm over, CO2 way under 0.000.
> > >
> > >
> > >             thanks, Ken
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