[Shotimes] Emissions question

[Leigh Smith]

Ken,
Also old fuel pumps lose pressure and lean things out before they die. They
throw no codes.
Eventually it starts missing at 2500-3200 rpm cruise, the leanest point.
Mine only did it when half-way warmed up. It can get very bad with almost
undriveable bucking..
Other high NOX possibilities are crossfiring plug fires, oil in plug wells,
vacuum leaks, engine pinging, burning oil, etc.Whether you can "feel" it
lean-out or not has to do with how severe  it is. It will show up in the
emissions first, then power, then gas mileage, then seat of the pants feel.
All this assumes no ATX and no EGR.

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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> > > Shotimes@autox.team.net
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