cx-9 will suddenly lose power and start jerking when you try to give it more gas

What is your question?

2010 cx-9 will drive normal then suddenly lose power and start jerking. The more gas you try to give makes it jerk worse. it still runs when you pull over and will drive in manual until, for no reason starts driving normal again.This is the problem when i take it to the dealer. they drive it around the block and say it runs fine. no warning lights come on and its not overheated. its at the dealer again because it lost power in the passing lane of a busy interstate.I'm expecting the same answer from them since it was driving normal when i dropped it off.Can anyone help?

What makes this problem better or worse?

seems to happen more after being driven awhile. interstate mostly

How long has your 2010 Mazda CX-9 had this problem?

1 year