rotten egg smell coming through the vents

Asked by Nine_volt Jun 21, 2011 at 01:01 PM about the 2005 Chevrolet Cobalt Sedan FWD

Question type: Maintenance & Repair

It only does it when the car gets hot and has been driven 20 mins. or more. It doesnt matter if the air is on or not. There is not a rotten egg smell anywhere outside the car. I can't figure out where it is comming from. please help

2 Answers
19,485

Jason answered 13 years ago

agree that the catalytic converter is bad, futhermore; is the engine running cool(temp gauge toward cold)? if so replace thermostat.

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