eggy exhaust smell

[bbell1984]

So my exhaust smell smells a little eggy if i kinda punch it a little. Does this mean my engine is running rich? if it is than what can i do?

btw, its an 07 mazda 3 sport gt manual

thanks

[Dave_The_BMXER]

I thought eggy was the cat going.. but it seems early for one of your cats to be bad.

[x_o_k_x]

it just means your car was sitting outside for a while and moistrure appeared inside your exhaust pipes

[mit-gee-mui]

Second last link from the bottom of this page.

And this link. http://www.torontomazda3.ca/forum/showthread.php?t=8887&highlight=eggs


These may help.

[random.pattern]

i think the trick is to stop having chilli for lunch. :)

(i kid, i kid.)

[mEtH]

Do you switch between grades of gas often? That can also cause the smell...

[Zoom Zoom Boy]

Gas with a high concentration of sulphur will cause the 'rotten egg' smell from your exhaust. Petro Canada and Esso gas have the highest concentrations of sulphur of the big 4 gas companies around. Sunoco gas has the least sulphur in it and Shell is number 2.

All the Mazda's I've driven and the cats in the exhaust (not real cats :) ) seem particularly sensitive to gas with high sulphur concentrations. It is the main reason I switched to Sunoco gas many, many years ago. With Sunoco, I have never had the rotten egg smell.

Here is a TSB (dealer info bulletin) for you with more info.

http://www.finishlineperformance.com/pdf/miata/bulletin/01-043-06-1678.pdf