[Shotimes] Oxygen Sensor Question

[Paul Nimz]

NOx is solely an EGR problem.  Has nothing to do with the O2 sensors.  The
NOx is created by high combustion temps.  The inert exhaust gas that the EGR
will introduce will keep the peek combustion temps down enough to prevent
the formation of the NOx pollutant.

Paul Nimz
'97 TR
'93 EG mtx


----- Original Message ----- 
From: "George Fourchy" <krazgeo@comcast.net>
To: <shotimes@autox.team.net>
Sent: Tuesday, April 13, 2004 12:17 AM
Subject: [Shotimes] Oxygen Sensor Question


> OK....our cars out here don't last forever.....they just last longer.
>
> One of the SHOs that was ini my fleet a year or two ago, and now belongs
to someone
> else, won't pass emissions....it puts out about twice as much NOx as is
allowed.
> Other than that, it runs fine.  It's a '91.
>
> Just for grins, we changed the oxygen sensors on it....got some Bosches
from NAPA.
> It didn't have any CE light issues before they went in, but now the KOEO
test says
> the two banks of cylinders alternately run lean.  This is the indication
problem
> those sensors cause, right?
>
> (I'm not a CE test procedure virgin anymore!!!)  ;-)
>
> What was the fix?  Seems like Autozone sold the proper sensors?  I can
take these
> back.
>
> I didn't keep those posts, because I didn't think I'd have this
problem.....shows
> you what _I_ know, huh!!??
>
> I'll run the test on the Lowrider tomorrow.  I'm thinking the EGR valve
has come
> apart on it, due to old age and sitting around for months, and it's
getting too much
> exhaust into the intake all the time.  That would explain the noise and
the power
> loss when it is warm.  I'll test THAT procedure tomorrow, too.
>
>
> George
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