Join Date: Jun 2006
Location: Kelowna,B.C. Canada
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What you are experiencing is the VGT veins in the turbo fluttering.they do not like to function under light load ,if you kick it down it will go away. Ford considers is normal for the VGT turbo.The loss of power when this happens is from loss of boost pressure as the turbo releaves itself with the flutter.
Basically ,the veins open and close quickly causing the noise.
Let it rev up and you will not have this issue.
Techinical ,Sales Rep
BD Diesel Performance
2005 F350 Lariet crew 4x4,125,000 miles,BD x-hale exhaust,BD transmission and convertor,BD xtreme air box,Edge platinum, BD x tuner,BD exhaust Brake and Autoloc Pressure lock Combo./1350x 20 Mickey Thompson ATV"S.on Eco 20" wheels
KC Light's,Manik Stainless bushguard,APE Wrap.