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  1. Apparent engine noise and loss of power @ 3,000 rpm

    I have a 2006 e450 u-haul truck with a 6.8L v10. It loses power as my rpms increase, and if I put my foot in it to try to accelerate, once I reach about 3,000 rpms it sounds like there is smoke knock as if the timing was off. When I power brake it, it won't break the tires loose, but the smoke...

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