Hissing wine sound - Ford Powerstroke Diesel Forum
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Old 11-13-2010, 11:27 AM
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Hissing wine sound

If I am going about 50 mph and then i stick it, I hear what sounds like a boost
Blowby. It does this for like 10 mph intervals. If I take it out of gear the sound goes away and it does not do this under lite acceleration only when boost is being built . I took it out of gear to varify that it wasent my drivetrain. Any ideas. Thanks
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Old 11-13-2010, 12:15 PM
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Maybe a cracked/torn boot somewhere??

Last edited by nine6stroker; 11-13-2010 at 05:58 PM.
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Old 11-13-2010, 05:45 PM
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Well I am pretty sure my internal turbo seals are leaking cuse I've got oil on my intake galley and the orange boots going from the turbo tithe heads are oily I checked my hpop and it's dry but the noise seems to be lower than the engine. It will not make the noise in neutral when I rev up the engine cuse it's doesn't really create boost without being under a load.
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Old 11-13-2010, 05:47 PM
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It's not so much a hissing sound but like a higher pitched flapping sound that you would make with ur lips. It's weird
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Old 11-13-2010, 05:59 PM
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Ah... I don't know what to say about that... I just offered the first thing that popped into my head. I'm sure some of the more knowledgable guys will chime in, just give it some time.
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Old 11-13-2010, 06:09 PM
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boost leak would be my guess. check all your pipes and boots
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Old 11-13-2010, 06:21 PM
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Thanks guys I appreciate the feed back. I wouldn't think it's an exhaust leak since it only does it under a load at a higher speed
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Old 11-13-2010, 07:08 PM
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Could be turbo surge. Tell us something (anything!) about your truck to help diagnosis.
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Old 11-13-2010, 10:36 PM
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What do u want me to tell u about the truck other than what's it's doing. And the truck doesn't lose any power when this happens
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Old 11-14-2010, 09:44 AM
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Thinking about that sound and the oily boots, maybe one of your valley boots is pulled off a bit and leaking at high boost. Mine started to pull off when they got too oily. Or any of the other IC boots. Plus that oil leak is worth investigating. Some oily seepage is normal due to the CCV, but other leaks happen up there. Maybe just a good cleaning with Simple Green and a hose, then watch carefully for the source of the leak.

We know you have a 99-03 7.3 cuz you posted here, but are there any mods? Good ones to know to help diagnosis would be if you have stock intake and exhaust, or if it is chipped or programmed, miles, etc. More info helps.
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