My 2006 b7 2.0t Quattro has been having a wierd issue with what it seems as a misfire but only at 2800-3200rpm. I have misfire in cylinder one now after changing the ignition cylinders but it dident show on my scan tool tell after a week and ran fine at first but the problem has got worst. Now I’m thinking spark plugs or ??? Need input. Never had issues tell now..