Before taking it in try to replace your mass airflow sensor and see if the issue is corrected. My boyfriend is having the same issue with his car and he has a 2010 edge ford and we just replaced all the spark plugs and coils along with the cylinders too. The same issue is still happening. His backfires after driving about 4 blocks from the house and sputters when going uphill but ran fine when driving on flat hills or if we accelerated the gas to me it up a steep hill it was fine but struggled if we went low or minimal speed limit.
Rare