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  #1  
Old 12-17-2007, 09:41 AM
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oscillating 'humming' sound when on gas between 1500 and 2000 RPM??? listen closely..

somewhere in between 1500 and 2000 RPM, when i'm on the gas, i hear a humming noise that maintains a consistent, slow, oscillating noise change (like a hummmmMMMMMMmmmmmMMMMmmmmmMMMMMmmmmmMMMMM).

it seems to go away as i get over 2000 RPM and also when i let my foot off the gas. my foot is steady.

does anyone else hear this? listen closely....
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  #2  
Old 12-17-2007, 09:49 AM
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yes i have been hearing it its recently started dont know what it is..!?
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Old 12-17-2007, 09:55 AM
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i forgot to mention... i'm driving a new 2008 4.8....
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Old 12-17-2007, 10:23 AM
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its only there if at a red light or parked
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Old 12-17-2007, 10:28 AM
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Quote:
Originally Posted by delhite
its only there if at a red light or parked
then you aren't experiencing same thing.... i'm talking about when on gas between those RPM's.....
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  #6  
Old 12-17-2007, 12:45 PM
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I got it on my 4.8 too. I can hear it when car is stopped. Sounds like a faint fan whinning. Its annoying. It picks up and then goes down at equal 2-3 second intervals.
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Old 12-17-2007, 03:27 PM
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I hear it too and it is annoying. It is the same sound I hear when an aftermarket sound system is installed on other vehicles and it requires a power suppressor.
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  #8  
Old 12-17-2007, 09:37 PM
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I think I have also been hearing it, and I turned off my climate system and it stopped. My guess is that it is the A/C running that causes this. I have a 2007 4.8i
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Old 12-18-2007, 12:32 AM
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I have this noise too . it's the fan or something.. as mentioned above turn off the climate control completely and it stops...
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Old 12-18-2007, 12:58 AM
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i will try turning AC off... BUT... i'm talking about a noise that I ONLY hear when i'm on the gas in between the RPM's I indicated above. so i'm not sure it's what you folks are hearing...
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