Took my 2015 Sport 2.4 to dealer for Tech bulletin updates to Fuel door lock and Software. I don't know what the software update was but now if I push the Gas pedal to the floor the engine stalls. Let it come back to 7/8 throttle everything is fine. Returned to dealer, no codes but the reset software to factory specs. Still have same problem. In addition the car now seems to have better performance in the Eco drive mode than Sport or normal. This is crazy.

 

This is crazy. Demand to take a service technician on a ride with you to demonstrate the behavior. You don't have to put up with this from a new car.