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whining noise under acceleration

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  #1  
Old 06-26-2007, 01:54 PM
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whining noise under acceleration

I have an 07 4.6L Screw with ~700 miles.

It makes whining/airy noise coming when I am under acceleration from 1250-1750 RPM. It sounds like something is releasing pressure and it only does this during these RPMS. As far as I can remember it's always done it.

Is this normal?

Thanks in advanced
 
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  #2  
Old 06-27-2007, 02:03 AM
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At various times that my truck has been in the shop, they've given me 2 different 2006 F150's with the 4.6. I noticed this same noise in both of the trucks. I don't know if it's "normal" or not, but it appears to be fairly common.
 
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  #3  
Old 06-27-2007, 08:37 AM
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Whining Noise

My 07 4.6 does the same thing. Sounds like the air intake is making the noise. I was thinking of adding a CAI and maybe that will fix it. I don't think it's hurting anything but it can be a little annoying at times.
 
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  #4  
Old 06-27-2007, 09:18 AM
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Sounds like the air intake is making the noise.
You're right, that's the general area where the noise is coming from.
 
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  #5  
Old 06-27-2007, 10:57 AM
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I have the 4.6l, I have the same noise too. I have heard that if you change the belt to a goodyear one, the noise goes away, but I am not sure. The whining does not really bother me, because the whining goes away after your reach 35 mph.
 

Last edited by Ilovemyford; 06-27-2007 at 01:08 PM.
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  #6  
Old 06-27-2007, 12:10 PM
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Originally Posted by Ilovemyford
I have the 4.6l, I have the same noise too. I have heard that if you change the belt to a goodyear one, the noise goes away, but I am not sure. The whining does not really bother me, since goes away after your reach 35 mph.
It wouldn't surprise me if it was a belt. Now which belt are you referring to?
 
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  #7  
Old 06-27-2007, 01:07 PM
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The alternator rubber belt. I think there is a diagram pic, once you open your hood you will see it. But I am not sure if changing it to a good aftermarket one will fix the problem.
 
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