smell from exhaust?

[blk05runner]

not to sure if I need to take the Runner in for problem. Every time I hit the gas kinda hard 'going up hills' the exhaust lets out a really bad smell. I like to drive with the rear window down but man does it smell when I hit the gas.
Can it be a problem with the exhaust or the Cat.?

 

[sharp4runr]

Do a search for sulfur tsb. It's been discussed in huge detail. The fix involves replacing some cats and reprogramming the ecu.

 

[blk05runner]

thanks for the info. well from reading all the info. on this it seems that it is really up to Toyota if they want to repair or just give some BS
Going to call the dealer but what is TSB?