Re: forgot to mention, its a 95 900se = no AMM - Saab Performance Bulletin Board - Saabnet.com
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Re: forgot to mention, its a 95 900se = no AMM
Posted by Eric Law [Email] (more from Eric Law) on Tue, 23 Oct 2007 08:54:44
In Reply to: forgot to mention, its a 95 900se = no AMM, Kent, Tue, 23 Oct 2007 05:52:55
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The cat could definitely be a factor.
Back when I worked as a mechanic, certain cars had trouble passing emissions and C900's were one of them. If left to idle for long before the test, the cat would cool off (having the cat farther back could exacerbate this problem), and the NOx number would be too high. This in spite of the fact the engine was in perfect running order and the cat was good (brand-new in a couple of cases).
Solution was to hold the engine at 3-4000 RPM for a minute or so to get the cat heated up, then run the emissions test *quickly* before the cat had time to cool off. We had very good luck with this technique, of course it requires cooperation from the person doing the inspecting.
Eric Law
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