Thread: peculiar humming sound
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Old Dec 28, 2011 | 05:18 PM
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onehundred80
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Joined: Apr 2006
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From: Ontario
Default Re: peculiar humming sound
The humming starts with the key in the "ON" position. the car has not been started. That's what I read in the OP's statement.
So it is not the air pump.
 
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