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Message: [QUOTE="johnboy27, post: 760326, member: 11729"] I have a 2013 F250 I bought a few months ago. I have an H&S Mini Maxx w/ DPF delete, Flo Pro 5" exhaust and a S&B CAI. I put all this on at the same time at 1000 miles. I now have over 12k on it. The issue I am having is after the truck is warm and has been running a while when I come to a stop...sometimes when I take back off I have 0 turbo pressure, then it will spin up and drop back down to zero. If I accelerate hard the turbo spools up and drops back down to 0 when I let off a little bit. It will do this for a couple minutes here and there. It does it off and on. It does it even when I am pulling the trailer sometimes. When it happends the diesel knock of the engine gets louder and black smoke comes out of the exhaust pretty heavy. Sometimes I can just take my foot off the gas and coast for a few seconds and get back on it and it will be normal again. Other times I have to be on and off the gas numerous times before the turbo PSI stays where it should normally be. Anyone else seen that happen? I have talked to H&S about it and they said they have not heard of that problem. I was hoping someone else has seen this and might know what it is if anything. I appreciate the help. [/QUOTE]

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