'89 Audi 200 failed Emissions test

[Robert M]

   HC out of spec is ususally overfuelling or poor cat function.  One thing 
that's really beneficial for the idle tests is to make sure the car is 
really warm before going; keeps the cat lit off.

>From: Sonar465 at aol.com
>To: quattro at audifans.com
>Subject: '89 Audi 200 failed Emissions test
>Date: Wed, 25 May 2005 16:17:40 EDT
>
>Just got back from the CT inspection station and I failed.  My Hydro  
>Carbon
>limit at idle was too high.  The Limit is 220PPM and I was at  324PPM.  Now 
>at
>the 2500 RPM test the limit was once again 220PPM and I was  at 82PPM.  The
>car is a 1989 200TQ with a dual knock sensor  motor.  I am wondering if any 
>of
>you guys care to take a stab and what  I might do to rectify this.  I 
>bought
>the car 5 years ago with 36K on  the clock and it now has 80K on the clock 
>and
>I have not replaced the O2  sensor.  Anything else I should look at?  There
>are no glairing  vacuum leaks that I can see and the car runs well.
>
>Cheers,
>Jim
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