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Registered
Join Date: Aug 2005
Location: Fort Collins, CO
Posts: 332
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Are you getting a CEL? If it smells of sulfur, your air/fuel ratio may be out of synch. This would not be good for the cats, but should result in a fault code being thrown that you should be able to read. Could be the result of a failing O2 sensor.
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2015 Porsche Macan S, Dark Blue Metallic
2011 BMW 328xi, Crimson Red
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