I have a 2008 Ford Fusion SE 4 Cylinder with 78,000 miles on it. When I accelerate I hear a humming noise coming from the front. The higher the RPM's the louder it gets. The sound begins after 1000 RPM's. I sat it and parked it and put my foot on the gas pedal and went up to 4,000 RPMS and it sounded like a siren you would hear in the movies for like code red or something I don't know. I have no idea what it may be. Answers would be very much appropriated. Thanks!
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