2011 Ford Explorer electrical system problems

Upon medium to heavy acceleration, such as accelerating onto a freeway, the vehicle cabin is filled with exhaust fumes from the engine. This injures the respiratory system of the passengers. They are working on a fix (after my family has been breathing polluted air for almost two and a half years). Ford has finally admitted that there is a problem, and send me a letter that said.

While idling and while getting car up to speed the AC cooling makes a weak sound and does not produce cool air. While idling the car overheats when the AC is on and blows hot air. Due to the effect this is a car with less than 60,000 miles on it the AC should still be in operational condition given it's only used 2-3 months a year since ownership. Car will also overheat while it's blowing heat during winter months. Engine coolant is at optimum levels and car will smoke while exhaust is on.