Just finished putting a new cam and heads (see signature), and after about 20mins of idling the most disgusting smell coming out of the exhaust. Like a horse farted on my face. My buddy though it smell like sulfur...
It does not happen when it is cold.

Any idea what this is.?

I do have Cats by the way.

 

The only time I ever smelled that was when the cat(s) start going bad... It's a terrible smell!

Greg

 

BTW, isn't the P-body a Fiero? Those cars are awesome. I had 2 GT's. Still miss them to this day. My '86 A3 ran 13.8 on spray.

Greg

 

Remove the cats...

 

As a matter of fact, it is. They are pretty cool... specialy with an LT1
Check out my web page:
http://www.FieroLT1.com

BTW, you might be onto something with the cats. I had the entire exhaust sandblasted for painting and I found a crap load of blast media inside the cats.
I wonder if the moron kill them.

 

Cool site - nice ride too!

Are you using the stock Fiero cat? If so, they fail ALL THE TIME like that. I had 3 go bad with that rotten egg smell.

Greg

 

No they aren't. They are DynoMAX Dynaflows. Specialy designed for 5.7ltr. engines. Both of them.