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To all of you that have a CAI.

I have installed K&N's CAI and sometimes when I am coming to a stop I will hear a click then a buzz/whir for about a second.
Do you have this noise? What the heck is it?
 

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Normal, you're hearing the vacuum noise from the throttle body which is normally masked by the large resonator you removed.
 

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I have never heard any noise caused by my CAI, sorry.
 

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I have always heard a vacuum noise upon cold start up, but then eventually goes away. I even hear the noise more when the A/C is turned on and the noise stays there.

My CAI is still connected to the resonator unlike the 4.7.
 

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I put the AFE on mine and it has a slight whir right after startup, but after the idle smooths out, it goes away. You will probably hear more of a whooshing sound as it is sucking the air in much more efficiently now.
 

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I put the AFE on mine and it has a slight whir right after startup, but after the idle smooths out, it goes away. You will probably hear more of a whooshing sound as it is sucking the air in much more efficiently now.
Mine does it also but it's only noticeable with windows down and the hood open (which is basically only when I'm playing around under the hood)
 
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