Whistling sound on accel - Ford Powerstroke Diesel Forum
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Old 03-05-2014, 01:40 PM
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Whistling sound on accel

2009 F250 SD, just developed this whistle. Only does it on normal accel, NOT while wide open, it gets LOUD. I checked all the intake connections, NADA. Any ideas?

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Old 03-06-2014, 08:40 AM
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Sounds like maybe an exhaust leak. Check the up pipes or possible a loose or broken exhaust manifold bolt.
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Old 03-13-2014, 08:34 AM
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Had the same problem when the truck was cold, turned out to be a bad flex joint on the down pipe.
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Old 03-13-2014, 08:35 AM
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Quote:
Originally Posted by keech29 View Post
Had the same problem when the truck was cold, turned out to be a bad flex joint on the down pipe.
Up pipe?? The down pipe does not have a flex joint.
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Old 03-13-2014, 08:40 AM
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cracked up pipe
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Old 03-13-2014, 08:49 AM
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Quote:
Originally Posted by 04hdfatboy View Post
Up pipe?? The down pipe does not have a flex joint.
Sorry, meant up pipe
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