My 16 2.7l Eco has only 4k miles on it and it has a ticking sound like an old odometer use to make. It usually only occurs between 30 and 50 mph and when on the throttle. if you let of the gas the noise greatly diminishes or stops all together. Ive seen many other posts but im not sure is any really relate to what im hearing. Anyone else have experienced this or have suggestions?