What's this BUZZING when at idle?? - Ford Powerstroke Diesel Forum
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Old 11-20-2010, 03:34 AM
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What's this BUZZING when at idle??

2001 7.3L Excursion with 152K miles has been with us about a month now. When the truck's at a stop light I can feel a vibration...more like a buzzing...in the brake pedal.

Put the truck in Neutral and the buzzing is less, but still there. Original motor and tranny and the underside looks fine, but if I can get rid of that noise, then the truck will be perfect.

Anybody have experience with this? How to diagnose it with one person?
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Old 11-20-2010, 09:17 AM
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hydro-boost
the brakes are running on your power steering pump
mine does the same(i just ignore it)
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Old 11-20-2010, 09:21 AM
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I'm going to make sure that the retaining bolts are tight and that there's enough PS fluid in there. Thanks for clearing that up...buzzing is a lot more weird than vibration; especially when the engine doesn't vibrate at all.
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