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Old 10-30-2012, 07:41 AM Rookie

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Please Help!

Ok truck is a 06 cc lariat with 35000 miles. A few months ago i noticed a subtle whine or whistle when motor is in 1300-1500 rpms with no load while driving. I can park in the driveway idle it up and hear the whine but can not find it anywhere. Noise goes away with more throttle and dies off when letting off. I have been to the ford store and mechanic said he never heard a better 6.0, but went to the performance diesel shop and they can hear the noise but do not have a clue. they said let it develope (has not got any worse)

Does not seem to have lost any power, just a anoying sound that truck did not used to make.

Any help would be apperciated i have went through every forum on the net about 6.0 whine and whistles but all seem to be about head gaskets and degas caps where this is more of a pump whine or could even be desrcibed as road noise howl while parked LoL.

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Old 10-30-2012, 03:05 PM
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Turbo's have been know to whine;whistle or sound like a jet takeing off
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Old 10-30-2012, 03:19 PM
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Have you had the EGR valve out recently? If so check to see if bolts are torqued down. When I did my delete I didn't get bolts tight enough and they backed of some and started a whining noise. Just a thought. Hope you find it.
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