High pitched whine - Ford Powerstroke Diesel Forum
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Old 04-10-2014, 12:59 PM
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High pitched whine

Not sure where this is going to end up but after searching I did not find much like what I am experiencing. I have an 01 7.3 exursion, on occasion (with no rhyme or reason) I'll get a high pitched whine when I take off, it only happens in first gear and never happens back to back. Any ideas where to start?
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Old 04-10-2014, 05:00 PM
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can you post a vid?
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Old 04-10-2014, 05:17 PM
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I'll try but I never know when it's going to happen.
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Old 04-11-2014, 10:31 AM
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check the easy stuff....loose/unconnected boost lines, cac tube boots, remove intake and inspect compressor wheel..black soot on uppipes and/or firewall/
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Old 04-11-2014, 11:40 AM
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Ok doing something different today, the whistle happens through the first acceleration after startup only. I have a video that I'll post when I get in front of a real computer.
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Old 04-11-2014, 12:29 PM
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Excursion whistle - YouTube

video here
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Old 04-11-2014, 01:36 PM
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Im not a 7.3 expert. BUT sounds like a boost leak or even just normal turbo whistle.

Sent from AutoGuide.com Free App
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Old 04-11-2014, 02:05 PM
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its not my normal whistle, thinking it may be a leak
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Old 04-11-2014, 06:57 PM
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ya, you can hear the whistle, under the whine. I'd start check'n for soot, loose clamps...if you dont have a set of upgraded cac boots, nows a good time...riffraff has them. them plenum stock boots suck and the clamps they use. get yourself a set of T-clamps and be done along with new boots. To really make a good seal, get the plenum inserts as well...same place.
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Old 04-12-2014, 02:55 AM
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Ok thanks, I'll give those a look.
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