[s-cars] Failed emissions testing

[serge]

Sounds like a typical absence of the catalytic converter condition to me.


Serge Filanovsky

95 S6 Avant



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> Hi All-
>
> Took the S6 for emissions testing in RI today and failed!  Passed the CO
> portion of the test, but failed the HC ppm both at idle and 2500rpm.  Limits
> are 220 for both and my results were 266 and 245 repectively.  Is the HC
> indicative of running rich?  Or is this a faulty 02 sensor fault?  Is this due
> to the MTM chip?  Anyone know of a fix?
>
> TIA,
> Riff
>
> '95S6
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