[s-cars] Emissions Question (NTC- no turbo content)

Wed Apr 7 23:29:32 EDT 2004

Had the same problem with my fully RS2'd S4.  Was
failing the idle HC. limit was 220, i was 447.
Ultimately tracked the problem to the cat in the
center section of the Stromung. My guess is that it
was fooling the O2 sensor into seeing a lean condition
and was forcing the mixture rich.  After swapping out
that center section, I passed, even though between the
two tests, Virginia dropped the requiredment from 220
to I think 120. No problem. And I started getting
20mpg highway which is pretty good considering the
modifications.

--- Mark Strangways <strangconst at rogers.com> wrote:
> I just did my emission here in good old Toronto,
> I drove back from Bellville, about 150 miles, then
> went home, shut down for
> a short time.
> Drove to "Drive Clean" testing facility, and shut
> down. Car sat maybe 10
> minutes.
> 
> idle.
> HC     limit 200, my car 75
> CO%  limit 1,     my car .02
> 2500 RPM
> HC     limit 200, my car 45
> CO% limit 1,      my car .18
> 
> This is with Stromung mit cat, Lehman stage 3. Stock
> everything else (I
> guess, can't remember).
> 
> Good numbers ? Works for me
> 
> Mark S
> ----- Original Message ----- 
> From: "Tom Mullane" <tmullane at snet.net>
> To: "'Rich Assarabowski'" <konecc at snet.net>
> Cc: <s-car-list at audifans.com>
> Sent: Wednesday, April 07, 2004 10:29 PM
> Subject: RE: [s-cars] Emissions Question (NTC- no
> turbo content)
> 
> 
> > Rich,
> >
> > 1. done
> > 2. done
> > 3. not done, will do the day of the test
> > 4. done
> > 5. done
> > 6. n/a
> > 7. changed oil today (3500 miles on old oil, 3000
> at first test).  Did not
> > change filter, but will change both oil and filter
> 30 minutes prior to
> test.
> > I did just the oil today to kinda flush out the
> system - if one oil change
> > is good, two are better, right?
> > 8. planned
> > 9. planned.  I will stop by the shop earlier in
> the day and make sure the
> > paperwork is all set, so I should be able to drive
> right in for the test.
> > I'm also thinking of calling in on the wife's cel
> to co-ordinate my
> arrival
> > so that the car sits for the shortest period
> possible.  (overkill?  Maybe,
> > but overkill is my MO)
> >
> > As an side, your car is stock right?  This whole
> PITA is making me nervous
> > about RS2ing the garage queen (she passed
> California emissions last month
> in
> > stock state).
> >
> > Thanks for the tips!
> >
> > Tom
> >
> > -----Original Message-----
> > From: Rich Assarabowski [mailto:konecc at snet.net]
> > Sent: Wednesday, April 07, 2004 10:12 PM
> > To: 'Tom Mullane'; s-car-list at audifans.com
> > Subject: RE: [s-cars] Emissions Question (NTC- no
> turbo content)
> >
> > Tom:
> >
> > I posted the following back in December, It should
> apply to a non-turbo
> > car as well.  The irony of this post is that
> yesterday I received a
> > letter from the company doing the emissions
> testing in CT stating that
> > they had a "software bug" in their testing and
> that my car was
> > incorrectly diagnosed as having high HC.  They
> would reimburse me for
> > repairs done at a repair facility, unfortunately I
> did them myself.  You
> > may wish to check with them whether your car may
> have been part of this
> > "buggy" testing.
> >
> > Here's my previous post:
> >
> > I brought my '92 S4 in early December to the newly
> resurrected emissions
> > testing in CT (now done at private service
> facilities instead of
> > state-owned).  I passed on CO but failed on HC at
> idle (400+ ppm).  The
> > car was warmed up when I went it but not really
> hot, it also sat for
> > about 20 minutes with the engine off before it
> went in.  I had been
> > running on 89 octane recently (car is unchipped)
> with no pinging, mostly
> > highway light-throttle driving.  The mechanic
> suggested I switch to 93
> > octane and get the car checked at an Audi stealer
> (yeah, right!).
> >
> > I went back in for a retest about a month later
> and passed with flying
> > colors, HC was 17 ppm and CO was only 0.01%!  The
> mechanic was amazed.
> >
> > Here's what I did:
> >
> > 1.  Ran down tank and filled with 93 octane
> > 2.  Ran a can of Techron through the gas tank,
> then back to untreated 93
> > octane
> > 3   Put in a can of dry gas (isopropyl alcohol)
> for one tankful to
> >     remove any moisture
> > 3.  Put in a can of 104+ Octane Boost to the 93
> octane 2-3 days before
> > the test
> > 4.  Cleaned the plugs and retorqued (they looked
> good, were not loose)
> > 5.  Checked for any vacuum leaks (found none)
> > 6.  Checked for any fault codes (found none)
> > 7.  Changed engine oil the same day of the test
> (important)
> > 8.  Took the car for a 1/2 hour ride at high rpm,
> got the oil
> > temperature nice and hot just before I arrived
> there
> > 9.  Kept the car idling when I arrived, mechanic
> took me in about 5
> > minutes later -- success!
> >
> > -- Rich
> >    92 & 93 S4
> >    Vernon, CT
> >
> >
> >
> >
> >
> >
> > _______________________________________________
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> >
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> 
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