[Shotimes] Sensors...was: Leather Seats, Woodgrain kits, and Oxygen Sensors!

[Paul L Fisher]

George has good experiences with O2 sensors. I got a CE light at 75,000
miles and again at 120,000 miles. After they were changed, you could see a
marked increase in mileage.

Paul L Fisher
'93 Ford Taurus SHO Crimson Clearcoat ATX 167K Build date 11/18/1992
- K&N Panel filter, Tokico Struts, Eibach Springs, Dynomax cat-back, Holley
190lph fuel pump, FPS rebuilt ATX, 26mm rear sway bar, Performance-Plus
Stainless Steel Y-pipe, Delrin sub-frame bushings, Amsoil Series 2000 0W-30
oil, Amsoil Synthetic ATF.
'00 Ford Explorer XLT 5.0L V8 AWD Oxford White Clearcoat 34K Build date
11/19/1999
- Amsoil Series 2000 0W-30 oil, K&N Fuel Injection Performance Kit

SHO Club member http://www.shoclub.com/
Check out my web site http://www.paul-fisher.com/
Amsoil dealer http://www.paul-fisher.com/oil.htm

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----- Original Message -----
From: "George Fourchy" <krazgeo@jps.net>
To: <shotimes@autox.team.net>
Sent: Saturday, December 28, 2002 1:42 PM
Subject: [Shotimes] Sensors...was: Leather Seats, Woodgrain kits, and Oxygen
Sensors!


> On Sat, 28 Dec 2002 01:04:15 -0500, Chris \"Zap\" wrote:
>
> >Yet another pondering about random SHO ideas lately....
> >
> >First of all, I wanted to confirm that replacing an oxygen sensor that
isn't
> >throwing any code has no benefit.  I figured that it isn't worth spending
> >$40 if it will work the same as the current one.  I know there is a
testing
> >procedure on SHOTimes, which I plan to use on the bad one (I think its
the
> >wiring, because it is intermittant), but I remember a debate in the past
of
> >whether replacing the sensors just because they are old does any good and
I
> >cannot remember what the conclusion was.  I hope to maybe get under the
car
> >tomorrow and finally do away with the sporadic CE lights! :)
>
> I'll just mention what I have discovered with old oxygen sensors.
>
> I had a Tbird Turbo that went 200K miles.  I changed the sensor on it when
it was
> recommended, at about 85K miles, and there was no change.  The car got up
to 33 mpg
> or so at cruise all the time I drove it.  So I figured that they don't
wear, and
> didn't need any attention.  Then, I heard from the list's performance
gurus,
> particularly Nick Chrimes, that they tend to slow down in their switching
from rich
> to lean as they age, and they should be changed after a certain period of
time.
>
> So, when the Lowrider started getting up in miles, around 150K or so, I
started
> paying particular attention to the variations in mpg that it got.  The
mileage would
> vary, depending on how I drove it, but would still average fairly
good...22 or more
> in town, and 26-30 on the highway, depending on length of trip, a/c usage,
and
> altitude of the highway.  After it got to about 220K or so, it did start
to
> fluctuate.  I never have gotten a CE light for the sensors, but they
apparently slow
> down in their ability to sense changes in the mixture of the exhaust over
time, and
> they had gotten so slow that mileage in town dropped to 15 or 16 mpg, but
stayed
> above 24 or so on the highway.  In town, the throttle gets moved much
more, of
> course, so the mixture fluctuates from cruising at 30 between lights to
accelerating
> from a stop, and then slowing for a light, with the throttle closed.
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