I have a stock 2014 v6. This problem happens more on cold starts, but when I start to get on the throttle and downshift somewhere in the 3000rpm range the car hesitates, and a few times has jerked. Is this normal? I am wondering if its regular blended gas. I put non ethanol 93 in the car today, and it seems to run smoother. I also wonder if the car is not getting enough air and may need a CAI.