Re: Smog Test = GROSS POLLUTER

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

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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