had wheels and tires balanced, and problem is still there. Around 50mph it becomes noticable. Not new wheels or tires. When I let off of the gas the vibration stops. I can feel the acceleration in the steering wheel, but not in any foot pedal or shifter. Inspected breaks and no rotor warpage. Brake pads not thin.

I also thought fuel filter based on diagnosing previous vehicles, but dealor says with the tc it is a part of the fuel pump assembly and not a part of regular maintenance.

any suggestions on the next item(s) to inspect or replace is greatly appreciated.

 

its an 05 tc with 88k mi