Gas Recirculation Valve (egr Valve) problems of the 2014 Mazda MAZDA3

On February 23, 2015, I purchased a new 2014 Mazda 3 s grand touring sedan with technical package, VIN # jm1bm1w33e1179575. The vehicle current mileage is 5,470. Since purchase, this car has had a stalling problem that is intermittent, unpredictable, and not reproducible on demand. Stalling means it does not respond to normal pressure on the accelerator, and literally coasts for a period of time. This time may vary from 2 to 10 seconds in a given instance. During this time the motor is running, there is no check engine light, and no codes are thrown. I have learned that quickly repeated pressing of the accelerator may help terminate the stalling. Common factors when stalling occurs seem to be when the engine is warm. The car has been driven for a while, and then the car has been parked for a short time, restarted, and moved back to traffic followed by a 90 degree right or left turn or car is driving normal route then stops for a stop light/stop sign or traffic, followed by a 90 degree right or left turn. In both these scenarios, there is a sharp turn. The car will just finish the turn and then stall when the accelerator pedal is pressed. It should go without saying that if this problem occurs at the wrong time, it could be a major safety hazard to life and property.