Hellokit help

outback 2.5xt limited,243hp,241lb torque@3,600 06’ with 30k. Lemon law won’t apply.

Hesitation only @ mild acceleration betwwen 55-65. Can be induced. No other performance issues.

Reprogrammed computer, change oxygen sensor, air filter. Then told"live with it" Only used high octane and service done on time with Subaru. Help!

How do you induce the hesitation at 55 to 60 mph range…by playing the throttle? And the check of the throttle position sensor response?