Re: High NOx in New Jersey, 93 Volvo 940 wagon - Saab Other Cars Bulletin Board - Saabnet.com
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Re: High NOx in New Jersey, 93 Volvo 940 wagon
Posted by kansas (more from kansas) on Sat, 29 Oct 2005 13:52:39
In Reply to: Re: High NOx in New Jersey, 93 Volvo 940 wagon, SWEDECAR [Profile/Gallery]
, Sat, 29 Oct 2005 13:20:07
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Hi Swedecar. I have searched iATN email and TDF archives but not found your thread, would be happy for a more specific reference & would try again.
Volvos without EGR tend to have high engine-out (ie pre-cat) NOx and depend heavily on the cat to lower NOx values. I haven't looked but suspect the 960 in question has no EGR.
If the original poster can list full gas readings from the smog inspection report, I will run the Lambda calculation. That calculation will indicate with high reliability whether there is a problem with engine control or a problem with the cat. I'm betting on the cat in this instance. Of course there can be multiple problems.
posted by 208.53.80...
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