Andy Anderson
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• Jacksonville, FL, USA |
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• Registered on 1/17/2005 |
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• 77 posts |
• 1 Vehicle
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 Posted:2/17/2008 13:22 |
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when the air is cool and I let off the throttle I hear a low drowning sound coming from the intake. The only sound I can compare it to would be that of blowing into an empty soda bottle. Sound familiar? |
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davecarpe
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• Newton, NJ, USA |
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• Registered on 9/2/2007 |
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• 29 posts |
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Posted:2/17/2008 19:15 |
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Is this a PowerStroke Excursion?
If it is it is probably the turbo lowing excess pressure back through the intake when the tubine slows down. It may also do this on the upshift.
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Andy Anderson
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• Jacksonville, FL, USA |
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• Registered on 1/17/2005 |
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• 77 posts |
• 1 Vehicle
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Posted:2/21/2008 13:33 |
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no, V10. Only occurs when the temp is below 60 or so. |
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monsta
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• The Big Island, HI, USA |
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• Registered on 1/5/2002 |
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• 1,056 posts |
• 2 Vehicles
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Posted:2/22/2008 01:21 |
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Never heard of this.
Have you done anything in or around your intake recently?
Could be a loose, leaky or disconnected hose, bad filter element or a connection is loose for starters.
Of course, it may be a vibration somewhere that just sounds like your description.
Let ask, can you make it make the sound in Park or does it only do when you're moving?
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Andy Anderson
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• Jacksonville, FL, USA |
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• Registered on 1/17/2005 |
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• 77 posts |
• 1 Vehicle
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Posted:2/22/2008 16:10 |
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The noise will occur in park as well as in Drive. As I said it only occurs when the temp is below 60, so it is very infrequent outside of Jan-Feb. I have traced it back to the intake. I have a drop in K&N, but noise occured with OEM filter as well. Nothing felt loose when I checked. |
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monsta
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• The Big Island, HI, USA |
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• Registered on 1/5/2002 |
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• 1,056 posts |
• 2 Vehicles
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Posted:3/1/2008 03:56 |
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I have no idea. 
Since you can replicate it at will it may help if you got a mechanic's stethoscope and tried to trace it to its exact root.
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