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Re: is 3500ppm nox precat on a 97 cavalier too high?
Posted to Emissions Forum on 2/13/2004 26 Replies

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Bad CAT sounds like a weak argument, as it does not explain why the reduction from 3500 ppm to 70 ppm at 25 mph, but only reduces 3500 to 500 at 15 mph. Something is bogus here.

How can engine-out N... Login to read more.

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