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Discussion Starter #1
I have a 2009 6.4 with roughly 120k on it. The truck seems fine under idling conditions but as soon as you put it in gear and give it normal acceleration the boost gauge almost pegs. As you let off the pedal I hear a high pitch whistling sound and sometimes a bubbling like noise. When it first happened the truck threw a code for the exhaust back pressure sensor which I have since replaced but that did not solve the problem. I know nothing about diesel engines. Any help and/or guidance as to what the problem may be would be greatly appreciated.

v/r

Alex
 

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Discussion Starter #3
Thanks for the reply. I ended up taking the truck to a local shop and they said the same thing. This afternoon I began removing the old DPF and to my amazement it was completely hollow.
 
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