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What is this part on my intake and what does it do?

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Old Dec 31, 2009 | 12:37 PM
  #1  
gameguru007's Avatar
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From: Seabrook, TX
What is this part on my intake and what does it do?



1999 4.6L V8
 
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Old Dec 31, 2009 | 01:17 PM
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Excellent question... hopefully JBrew will be along shortly, as i too have often wondered what this little devil does..
 
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Old Dec 31, 2009 | 01:22 PM
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Iac silencer? I dunno, that's my guess lol. I don't have that year
 
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Old Dec 31, 2009 | 01:41 PM
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idk, because I am installing a Spectre 9920 cai into my truck, and I've been having troubles with a kind of air horn noise, and I was wondering if this would have something to do with it...

It's annoying.
 
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Old Dec 31, 2009 | 04:31 PM
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Got it!!!

http://www.jegs.com/InstallationInst...-77-2514KP.pdf

Step 4



It's the idle air control chamber, in effect an air disruptor to make less air go into the engine. If too much air goes in, of COURSE it's gonna idle super low. Ugh lol


But finally someone has an idea.
 
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Old Jan 4, 2010 | 08:27 AM
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it's the silencer for the IAC
 
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Old Jan 4, 2010 | 05:43 PM
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From: Pittsburg, Texas
when i put my K&N on i took this off and it didnt run right ALL!

so i put it back on and it was all good...i didnt know what it was or what it did.
 
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