My 2007 Ford Mustang GT has an odor when you get out that smells like something rotten and when i start and stop the car a lot the inside of the car has a rotten smell also the other day in traffic I noticed a white looking smoke coming out the right side of my exhaust and the other cars in the traffic didn't (it wasn't cold out) The car runs normally and I haven't lost power and no lights come on as warnings