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Loud whistling noise

 
Old 06-12-2019, 09:44 PM
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Default Loud whistling noise

Hey guys, wondering if someone can help me.
I'm having a loud whistling noise that sounds like wind noise around 70-80mph on the highway. I would say around 2k RPM range. The weird part is when I release the throttle the sound goes away completely. I am thinking it may have something to do with the turbos but Iím wondering if anyone else is having a similar issue. Btw the noise happened before any modifications.
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Old 06-14-2019, 06:53 AM
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Is your airbox seated/closed completely?
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Old 06-14-2019, 07:21 AM
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Yes the air box is seated properly. Itís a roush intake so the top is open for the airbox but once you close the hood it seals the air box. And like I said I was having this issues when I bought the truck bone stock. So I donít think the CAI is affecting it.
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Old 06-14-2019, 07:56 AM
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if it's only at cruise on the highway and 2000rpm, seems like it may be a wind noise/window seal thing. but it's odd, because you'd hear the same loud whistle if it were the turbos and a poorly sealed intake system at any sort of throttle where heavy boost is commanded.
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Old 06-14-2019, 02:12 PM
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I thought it was a wind noise as well but it dosent make sense for a wind noise to go away when the throttle is released. Like it completely goes away no matter what if the throttle is released which makes it seem like a turbo issue.
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Old 06-14-2019, 02:35 PM
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I would check all the charge air cooler boots(inter cooler) also all the turbo clamps. The smallest leak will make a whistle noise.
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Old 06-14-2019, 03:00 PM
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ooof. I'm wondering if someone drilled a hole in your intercooler
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Old 06-18-2019, 11:24 AM
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Yeah Iím going to check all the charge air pipes and any connections on the boost side. Thanks guys Iíll keep yíall updated 👍🏾
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Old 06-18-2019, 11:48 AM
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Default Noise at 75-80

My 2016 2.7 Screw does the same thing. Most likely it wind noise...a high pitch whistle from the windshield or antenna or whipers. I just went faster and it went away over 90 or under 80 mph, No noise!
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Old 06-18-2019, 01:46 PM
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This might sound silly but if you have an aftermarket antenna on your F-150 that is smooth, it will create a whistle at highway speeds. Check to make sure your antenna has a wire spiraled around it or remove the antenna and see if the noise disappears.

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