2011 Mazda CX-7 Engine Problems

MY CAR WILL LUNGE FORWARD WHEN IDLE AND WITH MY FOOT ON THE BRAKE. IT'S VERY DANGEROUS AND HAS NEARLY CAUSED AN ACCIDENT ON SEVERAL OCCASIONS. THIS HAS BEEN OCCURRING SINCE I BOUGHT THE CAR USED IN 2013.

FROM THE DAY I PURCHASED MY CX7 THE BRAKES WERE NOT WORKING PROPERLY AND THE AIR CONDITIONER MADE LOUD BANGING NOISES AND DOES NOT GET COLD. WHEN I WAS AT MY WITS END AND TOOK CX7 TO DEALER AT 9,600 MILES MAZDA SAID I HAD A BAD MASTER CYLINDER AND REPLACED IT. WHEN THE MASTER CYLINDER WAS REPLACED MY CHECK ENGINE LIGHT CAME ON. MAZDA ORDERED ANOTHER MASTER CYLINDER AND A BRAKE BOOSTER. WHEN THESE WERE REPLACED MY CHECK ENGINE LIGHT CAME ON AGAIN. MAZDA SAID MY ENGINE WAS RUNNING ON A LEAN MIXTURE AND CORRECTED THIS. THE CHECK ENGINE LIGHT IS OFF CX7 RUNS VERY ROUGHLY. ONLY USE PREMIUM GASOLINE AND SYNTHETIC MOTOR OIL. MAZDA FIELD REPRESENTATIVE ADVISED ME AND DEALER THAT LOUD NOISE FROM AIR CONDITIONER IS NORMAL AND TYPICAL OF ALL SIMILAR MAZDA VEHICLES. I HAVE THIS DOCUMENTATION REGARDING A/C IN WRITING FROM MAZDA. AIR CONDITIONER BARLEY GETS CAR COOL, IS INEFFECTIVE WHEN TEMPERATURE IS NINETY DEGREES. MY BRAKES ARE SLIGHTLY BETTER, BUT STILL LOW AND SOFT. CX7 RUNS EXTREMELY ROUGH AND IS GETTING VERY POOR GAS MILEAGE. *TR

TL* THE CONTACT OWNS A 2011 MAZDA CX-7. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 65 MPH WITH THE AIR CONDITIONER ACTIVATED, THE VEHICLE WAS MAKING A BANGING AND RATTLING SOUND. THE CONTACT STATED THE SOUND WAS ALSO HEARD WHEN THE TURBO WAS ACTIVATED. THE FAILURE WOULD OCCUR WITH OR WITHOUT THE AIR CONDITIONER ACTIVATED. THE VEHICLE WAS TAKEN TO THE DEALER WHO WAS UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 14.