I have a 2013 Gt Convertable Premium 6-speed and dealer has had my car for 2 weeks. Bad smell (like cats are bad) over 3k rpm. 100% stock with no aftermarket stuff. Have over 3000 miles from vacation (south Louisiana to Pegion Forge, tn) and smelled before trip and still smells (all the new internal exhaust coatings should be burnt off by now). Way worse since Convertable and cant even ride with top down!!! Dealer has had car for 2 weeks and nothing.... ford said may be high injector pressure which is bs and makes no sence. I mean its not a "rich" smell and no black in exhaust tips. Becides i would think the pcm would adjust for richness. I mean they even sell higher pressure injectors for performance! Any way... i contacted Ford and they are suposed to call me tomorrow. Last time i went to check on it they had it hooked up to an automatic to compair pcm and asking if i had a tune one it and saying i need to use a lower octane than premium fuel. On a side note... also had some debris in a spot on the door paint and paint shops said they wont touch it since candy red metallic and will never exactally match. I use to run an autoparts store and restored my 67 almost entirely by myself before i became a chemist and i get treated like a dumb a$$ when i try to get an explination of the issue. Can anyone please help.