EcoboostDave

I have a 13 Ecoboost with a Livernois tune. When I get on it pretty hard my truck seems to have a rotten egg smell. anyone else experence this? What causes this smell? Thanks.

Joewee3.5

Catalytic converter is my guess.

klumb15

natural gas leak is my guess.

BoostEd6

When cat converters go bad they smell like that.

Adobe2X

Are you sure it is the engine smelling like this? The AC vents have a habit of having mold in them, and I wonder if when you jump on it, either the air circulation is increasing enough to pick some of that up in the vent system, or the moisture in there is stirring it up....just a thought.
Lysol sprayed in to the base of the windshield while the truck is running really helps with that problem.
If it is the tailpipe smelling like that, then yes, its probably a cat going bad.

Ben the Isäntä

If it is something with the ac, shut your ac off 5 seconds prior to shutting your vehicle off. I've noticed that helps a lot with the rotten ac smell.

EcoboostDave

This has been without the A/C or vent running. I can smell it under the hood. It only had 1,500 miles on it. Since I bought it, it has always had some funny smell under the hood.I think I'll return it to stock and take it in and have the dealer look at it.

hardhat

Too much protein

EcoboostDave

HaHa maybe. It doesnt do it everytime I hammer on it. Its really only done it twice. The truck is running fine so i'm not gonna worry about it right now.
I was just seeing if anyone else has experienced this. Thanks guys

Ben the Isäntä

When I worked at the dealer, I always did notice that brand new cars had a funny smell when we started them up after we got them off the truck.