I have a rotten egg smell coming from my exhaust.... What is causing it.

any help out there? thanks Linda

 

The most common cause of rotten egg smell coming from the exhaust is a failing catalytic converter.

What vehicle do you have? Need that information to move your post to the appropriate tech section.

 

I have a 2000 Blazer 4.3 4wd

Thanks for the reply.... Linda

 

That smell is most likely hydrogen sulfide, which is being formed due to a faulty reaction in the catalytic converter. Its possible the engine is just running very very bad and overwhelming it, but as swartlkk said it is most likely a bad cat.

 

thanks for reply.. I am visiting my brother in LA. so now maybe he can fix it, before I drive back to CA.

 

Bad gas is also a culprit of the rotten egg smell. Try filling up at a different location. If you still continue to get the smell, it’s a bad cat converter.