BAD smell!
My Nissan truck(1997 with 160,000 miles) has developed a bad exhaust smells like rotten eggs. After searching this site, the only clue I have found is the catalytic converter is the problem. Is it going bad? Could it be the type of gas I am using(regular, cheap stuff)? I recently tuned it up and gas mileage is running above average. Thanks for any input!!
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