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Whistling / hissing noise

Whistling / hissing noise

Postby jenanjason [OP] » Jul 06 2012, 8:18pm

I have a 2004 Chevy silverado 1500 with a 5.3. It recently started making a hissing noise or kind of a sucking air noise coming from the drivers side of the engine like by the intake when you press the accelerator. I just got the intake gasket changed still didn't fix it does anybody know what this could be?
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Re: Whistling / hissing noise

Postby raider27 » Jul 06 2012, 10:17pm

Man if you figure it out, post it up! Mine stopped whistling and I hate it!
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Whistling / hissing noise

Postby Machster69 » Jul 06 2012, 10:34pm

Lol one is worried about the whistle, one is worried about no whistle! Can you post a vid of it?
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Re: Whistling / hissing noise

Postby KraziP » Jul 06 2012, 10:51pm

If I had to take a shot in the dark I would lean towards a vacuum hose leaking, or something similar to that. Is your truck throwing any DTC's, is it worse under load than just reving it in park?
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Re: Whistling / hissing noise

Postby jenanjason [OP] » Jul 06 2012, 10:54pm

I want no whistle lol because mine doesn't sound good. How do u post a video? And it's throwing no codes at all and it's pretty much the same either under load and in park all you have to do is give it a tap
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Whistling / hissing noise

Postby Machster69 » Jul 06 2012, 11:29pm

It does sound like a vacuum leak, there are methods for checking these. Depending on where, you can spray starter fluid in there and see if the motor roms change... Video: use your iphone, record video, upload to youtube, share the url here...
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Re: Whistling / hissing noise

Postby jenanjason [OP] » Jul 07 2012, 12:21am

[youtube]http://www.youtube.com/watch?v=czlIysAQWnE&feature=youtube_gdata_player[/youtube]
Last edited by EKinMN on Jul 07 2012, 1:52am, edited 1 time in total.
Reason: added youtube tags
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Re: Whistling / hissing noise

Postby xMOWERYx » Jul 07 2012, 2:22am

Does sound like a vacuum leak. if you cant find it try looking up a DIY Vacuum leak fix. If you can find a certain hose and a lit cigar you will be able to find the leak. You essentially just blow smoke into a certain hose and it will come out (IF its a vacuum hose thats blowing air) if it's sucking air it's going to be hit and miss trying to find it.
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Re: Whistling / hissing noise

Postby jenanjason [OP] » Jul 07 2012, 2:26am

Do I do this with the truck running or off?
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Re: Whistling / hissing noise

Postby xMOWERYx » Jul 07 2012, 3:14am

Here's a link to a video on youtube that will show you the basics. Granted this guy is goofy but he knows what he's talking about.
Hope this helps.

http://www.youtube.com/watch?v=zMok2y05jNE&feature=plcp
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