So lately my car seems to have a whole lot of hesitation. It pulls fine under mild acceleration until anywhere between 2 and 3000 rpms, then it gets bucky and acceleration is just plain awful. I had ipd's first generation TCV, which i heard was troublesome, so i just bought the new ARD tuning valve. After replacing the valve the problem seemed to go away but cam back after just a few days of driving. If i unplug the TCV and plug it back in, the same thing happens. My boost gage will spike to 13 or so under hard acceleration but if i hold the pedal in the exact same spot, the boost slowly drops. I have no check engine light on, but i'm not sure if i plug in a obd2 tester it will tell me something like misfire or bad o2 sensor... Any help would greatly be appreciated. Thanks for your time.