RE: Emission Test Failed! Help!

["Mike Miller (Volt) (Exchange)" <a-mikemi@Exchange.MICROSOFT.com>]

My understanding of the HC ppm is that is usually caused by unburned
fuel. For example, I had the secondary float set too high on a 4bbl carb
and was dripping gas into the secondaries at idle which caused me to
fail emissions a few years back. So I would ckeck for anything that
would allow fuel to go unburned. Possible causes could include: bad O2
sensor(if it's got one), weak coil, incorrect ignition timing, fuel/air
mixture settings and probably lots more things which other people on
this list will identify. Hopefully, this will help.

mike
91 200Q

>----------
>From: 	John Karasaki[SMTP:johkar@teleport.com]
>Sent: 	Wednesday, July 24, 1996 9:50 PM
>To: 	quattro@coimbra.ans.net
>Cc: 	audi-nw@u.washington.edu
>Subject: 	Emission Test Failed! Help!
>
>Emission Test Failed! Help!
>
>
>Ok, I'm not very good at diagnostics.  I have a problem with the V8 I need
>help with.  It failed the emissions test here yesterday.  The Oregon State
>standards are 220 ppm maximum hydrocarbosn (HC), 1% maximum carbon monoxide
>(CO), and 6% minimum CO + CO2 at two engine speeds:  idle (~ 900 rpm) and
>2500 rpm.
>
>Our V8 got:
>
>engine speed          HC ppm max            CO (%) max          CO +CO2 (%)
>min
>
>901                    396                   2.63                    16.2
>
>2323                   213                   0.85                    15.6
>
>Does anyone have an idea of where I should start?  I've never had a car that
>was this far out of specs.  No wonder we get less than 20 mpg!
>
>TIA.
>
>
>Regards,
>
>John Karasaki
>
>The Karasaki's, proud owners of AUDI automobiles
>
>1981 Coupe
>1982 TQC
>1984 5000S Wagon
>1990 V8
>
>