[s-cars] Failed Emissions - NOX Too High - Help please

[Tom Mullane]

Agreed.
Generally, high NO is either a bad EGR valve or a bad kitty.  Time for a Stromung?
Your ISV should not have an effect on NO.

Tom

Date: Mon, 12 Apr 2004 16:11:54 +0000
From: bob.rossato at att.net
Subject: Re: [s-cars] Failed Emissions - NOX Too High - Help please
To: "Mark E. Pollan" <mark.pollan at mci.com>
Cc: , S-Cars <s-car-list at audifans.com>
Message-ID:
<041220041611.12921.407ABFCA000A5410000032792160281302FF908B9E8C8C908DD19D90 at att.net>


Could be a bad kitty.



> Crap!!  Arrived at the Maryland emissions station overly confident - left
> with my tail between my legs with high NOX reading.
> 
> Pulled codes over the weekend and none came up with none on the VAG.
> Checked the fluctuation of O2 lambda value and all seemed well - meaning
> fluctuated quickly in the Bentley defined range.  O2 sensor only has 20K
> miles on it and is OE Bosch with OE connector.  Only issue I know of is my
> ISV.  Soaked in brake cleaner overnight and then Carb cleaner for a few
> hours.  My idle still drops so I do now know I need a new one.
> 
> April of '02 emissions show all gas readings WAY below state levels.  Car
> has MTM 1+ from Anderson installed a few weeks after the April '02 test.
> 
> Any ideas on things to check greatly appreciated.  Would a bum ISV
> potentially be the issue?
> 
> Regards,
> 
> Mark
> 
> 95.5 S6