I have noticed clicking sound coming from the front of my car.It happens when i'am going up thru the gears at around 2500 rpm or at a steady pace in 3rd or 4th at around 2500rpm. Sounds like a steady clicking noise like a plastic fan blade hitting something . A friend suggested the fuel injetection.I'am hopeing its nothing serious. Thanks in advance for any advice.btw my vette is a 2007 z06