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It looks to me like maybe your catalytic converter or the oxygen sensor
is fouled.  If the O2 sensor is bad, it will cause it to run rich to
compensate.  That would be your HC problem.  This could lead to over
working the catalyst and lead to high NO levels.  I'd replace the O2
sensor pronto.

Paul Anderson:
Any direct correspondence, please put my name in the subject line so I
don't miss it.
Please send any direct mail to my private address as I don't keep up with
the list very well.
 Private email AndersonPaul@juno.com

On Mon, 5 Apr 1999 17:43:21 EDT AUDI1OO@aol.com writes:
>Hey guys,
>	My '91 Audi 100 failed emmisions test...a shock to me.  The 
>checked everything out (i.e. sensors, etc...).  Everything seemed 
>alright...he thinks it may be this one hose (which was collapsed, and 
>replacement) or possibly the cat.  What was high on the emmisions test 
>the HC 1.37 gpm. (limit is 1.20gpm.) and NOx 10.70 gpm. (limit is 5.00 
> How can I lower these figures...any ideas?  How about adjusting the 
>mixture...Any suggestions are greatly appreciated.
>Thanks Again,

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