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i have a crazy noise after every cold start for a few seconds and when i drive my Truck and hold the rpm the noise come again and my Truck lost the boost.
I think its the VCV or a problem in the DPF system.
Here is a short Audio from the noise.It comes after 11 Seconds.
i believe that is the exhaust back pressure valve closing to aid in engine warmup.
this is a question best asked in the 94-97 powerstroke forum, down in the diesel section.
the guys down there will help you get everything running tip top shape.
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