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Old 07-09-2010, 01:37 PM   #2 (permalink)
daleks
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Join Date: Apr 2010
Location: St. Louis
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Drives: 2011 Evo X MR
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Quote:
Originally Posted by cruzmisl View Post
I've been hearing this vacuumish noise when going past 3.5k/4k RPM. It becomes a bit more audible as I get higher in revs past that point. Like something spooling up. It's very obvious when the windows are closed. I didn't notice it before when I got the car.

I'm pretty sure it's coming from the engine bay, and it sounds close up to the dash area. It only seems to happen when I'm driving--revving the engine in neutral doesn't appear to replicate it.

Am I just nuts?
It's probably just your air intakes. At higher revs you're moving a lot of air, thus causing the noise.
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