What does it mean when your car exhaust starts to get more noxious than usual?

What does it mean when your car exhaust starts to get more noxious than usual?
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1 Answer

Answer :

poor muffler? is it pumping out more smoke or does it just smell bad, worse than normal? if it just smells it could be a plethora of reasons ranging from dirt or rust on your pistons to a hole in your muffler, you’d need to get it checked out, and the sooner the better usually.
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