2007 Sonata 3.3L V6.
This noise is from under the hood, and I can pretty well localize it to
the right side of the car and toward the front. My best guess is
something that gets driven by the serpentine belt or the belt itself,
but I don't know what.
The noise is a whirring sound of low to moderate pitch, which rises and
falls with engine RPM. It is virtually inaudible at idle (600-ish RPM),
and is best heard at and above 1300 RPM or so. It is drowned out by road
noise at any speed over roughly 40 mph. The A/C being on or off doesn't
affect it one way or the other.
A quick punch and release of the throttle seems to cause the headlights
to dim noticeably for a second or two as the engine returns to idle. I
hooked up a code scanner device to the car the other night, and noted
that the voltage it read dipped to about 13.5 V with these quick
punch/release cycles on the throttle.
This is about the best I can do at describing it. Anybody have any good
e-mail: larry AT phatpage DOT org
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