Just lately I have noticed a Rotten Egg smell during WOT. Could this be either
A) Bad Gas, Here in Minnesota 92 Octane is the best I can get.
B) A bad O2 sensor...
C) Bad MAP Sensors... All warning lights are on (ABS, DCS, and one other I can't remember right now)

I have recently put on a new P&P head but still waiting on my uni-chip so no software upgrade yet. I also have a 15% pulley, Cat-Back, CAI,

Any help will be appreciated.

 

92 octane isbetter than we can get out west!

Usually that smell is because of a bad Cat.

 

Well it might be time for a OBX/Performance Cat... The car does have 75k on the ticker...Just what I need more horspower...

 

Bad cat +1

 

How many miles on the car? Is it brand new?

 

That would be my guess. WOT affects some differently than others.

 

yeh when i drive it hard! it smells right after! it stinks smells like the intake or sumthinG

 

rotton egg=cat

 

Only time I've smelled something like rotten egg in a car was when the battery was being over charged and it cooked it. It was an Ultima battery (dry) too.

 

+2

 

What's the smell when u drive it hard?!? Smells like intake?!? Have u guys experienced the smell

 

A smell inside the car when driving is very suspect and dangerous as well. If you smell exhaust inside the car when driving there is a good chance of a leak around the hatch weatherstrip. Exhaust cannot normally enter the car further forward unless there is a leak in the pipes themselves. Also, the old rotten egg smell is rare these days unless the cat is bad or improper/bad fuel is used or things are running terribly rich.

Since you have various warning lights on, I'd tend to consider the latter above.