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Dale , im having an issue with a stock tune i was playing with. It's for a Lml 2016, tune works but it throws a code P0299 code and derates the engine. I've noticed it really consistent when I'm doing about 70mph and I hit a little incline and I'm trying to keep that speed, Boost doesn't want to move much unless I put the pedal to almost the floor. If you drive it like I didn't car about the fuel mileage it doesn't seem to ever have the code come up. Just curious where I should start looking for this problem. I thought possible a turbo issue like the vanes were sticking but I had another truck i tried it on and it did the same thing.
