Re: Smog Test = GROSS POLLUTER

["Marc Peterson" <mpeters6@rochester.rr.com>]

Er..um..yeah, that should be the other way around.  Converter does HC's, O2
sensor and ERG system do NO.

Oops

Marc
----- Original Message -----
From: "Marc Peterson" <mpeters6@rochester.rr.com>
To: <scirocco-l@scirocco.org>
Sent: Thursday, October 18, 2001 4:42 PM
Subject: Re: Smog Test = GROSS POLLUTER


> Yup, a dead cat and a dead O2 sensor.  HP - i'm unsure of that.  I thing
> that its supposed to be HC, hydrocarbons.  If so, it means that you are
> running a tad rich.  A new O2 and no vaccuum leaks should fix that, unless
> you are running a wild cam.  NO - oxides of nitrogen.  These are the gases
> that a cat "converts."  If yours is original, its long past doing anything
> useful.
>
> BTW, where are you, Jersey?
>
> Marc
>
>
> ----- Original Message -----
> From: "Theron Ross" <ross@sanoh.com.mx>
> To: "Scirocco List (E-mail)" <scirocco-l@scirocco.org>
> Sent: Thursday, October 18, 2001 4:12 PM
> Subject: Smog Test = GROSS POLLUTER
>
>
> >
> > I went for the smog test this morning and my '81 'roc failed. It failed
so
> > bad that it's a gross polluter.
> >
> > The guy at the "test only" station said he thinks the problem is the
> > catalytic converter.
> >
> > At 15 mph, my HP (PPM) was measured at 177. The Max. is 162.
> > My NO (PPM) was measured at 3148. The Max. is 1318.
> >
> > At 25 mph, my HP (PPM) was 122, below the Max. of 162.
> > My NO (PPM) was 1800. The Max. is 1800.
> >
> > The car is idling right at 900 rpm and the timing is right on. The car
> runs
> > very well since I repaired the aux air regulator this past weekend. But
> when
> > he put it on the "dyno", I could smell the fumes from my car. He tried
the
> > test three times, so I think it was pretty much warmed up by the third
> test.
> >
> > Any opinions would be greatly appreciated.
> >
> > 1. Does anyone out there have opinions about his cat diagnosis? I
> inspected
> > the cat a couple of years ago when I installed a tt downpipe and
cat-back
> > exhaust. It was mostly clear, but it appear to have a few little
plug-ups.
> > The technician today thinks it is the original cat.
> >
> > 2. My car was running lean when I had the aux air regulator hose
problems
> > which burned out the Ox sensor. I replaced the Ox sensor and unknowingly
> > drove around with the aux air regulator hose problem for while, so I may
> > have burned out the new Ox sensor. Could this have happened a be the
cause
> > of my smog problem.
> >
> > 3. If I replace the cat, should I replace it with one of the high-flow
> cats
> > that techtonics sells? I'll try Potterman first, of course. Do the
> high-flow
> > cats do any worse of a job because they are designed for high flow?
> >
> > 4. Is looking through a cat the correct way to check if it's working?
> >
> >
> > TIA,
> > --Theron
> >
> >
> >
> >
> >
> > --
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> >
> >
>
>
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