Whistle at highway speed

TerryJ

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Make
Ford
Model
F150 super crew
Year
2005
Miles
75000
Engine
5.4L
I own a 2005 f150 super crew p/u. At speeds typically 55+ I have this annoying sounding whistle coming from the front end somewhere. It's definitely audible in the cab. Anyone have an idea what this is or have ever heard of this? Thanks
 

billr

wrench
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Whistles are usually from a vacuum leak.
 

TerryJ

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That sounds reasonable but how do keep it from spinning after initial start up?
 

Mobile Dan

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Same noise if you are traveling down a big hill at 55+ (basically coasting)?

Same noise if you are traveling up a big hill at 55+ (lots of throttle)?
 

TerryJ

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Same noise if you are traveling down a big hill at 55+ (basically coasting)?

Same noise if you are traveling up a big hill at 55+ (lots of throttle)?
Same, doesn’t matter. Crack a window say going under an overpass and it sounds really loud.
 

Mobile Dan

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Got a sunroof, bed cap, or ladder rack?

Does the noise happen briefly at speeds slightly below 55 if you meet a big truck on a two lane road?
 

TerryJ

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Got a sunroof, bed cap, or ladder rack?

Does the noise happen briefly at speeds slightly below 55 if you meet a big truck on a two lane road?
No sunroof, bed cap, or ladder rack. I haven't noticed any whistle meeting a truck. This doesn't seem to hurt anything, but it's definitely annoying, especially on a long trip on the interstate
 

Mobile Dan

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You could fasten a phone under the hood and set it to Memo or something to record sound. Then drive it fast enough to duplicate the condition and honk the horn when you hear it to "mark the spot" in the recording. Don't put the phone in a hot or windy spot.
 

billr

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Window and door seals are also common whistlers.
 

billr

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Window and door seals are also common whistlers.
 

grcauto

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I had a customer who's Astro van had an aux fan would spin at about 50mph and better. Sounded like a siren. I used a zip tie to secure it since it was never used.
 

PC

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Hmm, could a piece of road debris be caught on the chassis somewhere that catches the air just right to make that sound. Could the belly pan, if present, have come loose.
 
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