Have had my Acura for about 1 year now and have been dealing with a vibration. Car idles fine the vibration occurs under acceleration which progressively become more noticable as speed increases. Took it on a long trip and after about 30 minutes of driving it became a real nusiance. I've taken it to 2 different mechanics to check things like spark plugs, tires, alignment, CV joints, TPS sensor. Had to replace the radiator three days after I bought it because it had a crack. Car didn't reheat on the way to the dealer. I fear the worst that it may be a head problem but there isn't a smoke problem. Can feel the vibration in the steering wheel and in my seat while driving. I'm not a mechanic to say the least so I have no clue. Any thoughts?

 

If you can feel the vibration on the steering wheel, it might be a sign of wheel out of balance. When does the vibration starts? All the time or just at certain speed?