I have a 2011 Accord 4 cylinders manual with only 85000 miles. In the past 2 weeks, I have noticed a bad vibration coming from the front but only when I hit the gas, usually from gear 2 and up. I replaced the PCV valve and inspect the spark plugs, which are fine. Add some fuel injectors cleaner but problem still the same. I then lift the front, removed the wheels and rotors and simulated the driving but vibration is still there. Took to a local shop and they could not hear or feel anything (it was raining). So, I am frustrated about it. Besides this, car is great. Anyone has experienced similar problem??