[Florex]

I finally took my 4runner to the dealership and they performed the TSB for the sulfur smell. The smell is pretty much gone, however during hard acceleration (like getting on the onramp of the free way or going up steep hills on the freeway i could still smell that horrible smell when the rear window is down). has anyone else had their's serviced. is there no trace of the smell at all?
Also, when i first got it done there was like a burning smell but i figured it was just the new cat getting broken in, and it went away after a few days. everything is great, it's just those times of hard acceleration that the smell comes out.