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Why does my car smell like rotten eggs?

Tiny
AUSTIN1997
  • MEMBER
  • 2012 FORD ESCAPE
  • V6
  • 4WD
  • AUTOMATIC
  • 145,000 MILES
The inside of my car smelled like rotten eggs one day when I went out to it. I have cleaned it out thinking maybe it was something in there the smells still is there after couple of days. I have smelled the muffler when the car was on and it smells like normal exhaust fumes so I would not think it's the catalytic convertor. I was not sure if there was an answer that could be causing this foul smell. [The car is a 2011 not 2012]
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Thursday, May 6th, 2021 AT 3:12 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
The number one reason for this is the catalytic converter. So I would suggest testing the converter as smelling the exhaust won't be sufficient. Here is a guide that will help with this:

https://youtu.be/kNXh1Lphzr4

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

The other reasons are fuel issues or old transmission fluid. I would suggest checking the fuel pressure next and then check the fluid to make sure it is not old.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

However, I suspect you have a failed converter and it will need to be replaced. Let us know what you find with this material. Thanks
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Friday, May 7th, 2021 AT 8:15 PM

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