So recently had a Roush TVS installed on my 2011 Mustang. Took approx 5 revisions from my tuner to get the car to idle correctly, anyhow that's all solved, car drives great. Last night driving to a car meet on the highway I noticed when cruising at highway speeds the car feels like it's hesitating. It'll be fine then for a second or two it feels like it's holding back then back to normal for a few seconds then holding back. If at a higher rpm or heavier on the throttle no issue. It only happens when I'm feathering the throttle to maintain that 70-75mph speed. Not sure what it is, as far as components it's a Roush TVS, 82mm pulley, FRPP 52lbs injectors and VMP BAP. Any help is appreciated.