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Old 03-27-2001, 09:34 PM
Kebowers Kebowers is offline
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Join Date: Jul 2000
Posts: 638
High NOx

cool off your engine!! probably have plugged or inoperable EGR valve. Also be sure engine spark timing is correct and the vacuum advance/retard is working correctly. If the CO level is OK, not likely the cat muffler is bad, but possible.
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