Exhaust is entering the passenger compartment through the front and rear air conditioning vents when the engine is accelerated to 3500 RPM or above. I noticed this condition while driving around town, when passing another car or accelerating to enter the freeway, but the problem was really evident on a recent driving vacation from Kansas City to seattle wa. We went through several mountainous states and it was terrible, the car was constantly accelerating above 3500 RPM to maintain speed on up hill grades, the car constantly reeked of exhaust. We had to roll the windows down to keep it aired out. I took the car to my Ford dealer when I returned from the trip, they said there is no problem. I am not going to argue with Ford over this, I have purchased a carbon monoxide meter which I keep in the car and have recorded carbon monoxide in the cabin as high as 15 ppm during acceleration. This car needs to be recalled, I have read that I am not alone, this problem exists on Ford Explorer manufactured from 2011 - 2015. Why ?

- Kansas City, MO, USA

There is a foul smell in the vehicle, maybe burning plastic on the vehicle or exhaust. The fumes gets inside the vehicle that can make it unbearable when you have the ac on. You can not stay in the car. The ac has to be turn off and all windows open in order to continue driving. I brought the vehicle back to the dealership for service, last year. The service representative informed me that it was a plastic bag that got stuck in the exhaust. Once its burned off the smell will be gone. However. It does not seem to be the case. The foul smell is getting worse that its unbearable to stay in the vehicle with the ac on.

- Staten Island, NY, USA