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hesitation
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  1. 6.4L Power Stroke Engine and Drivetrain
    So my dad has a 2008 F550 6.4. When I go from a stop or low speeds to high speeds, at around 40mph the truck starts to hesitate. I’ll stay on 40-45 for about 10 seconds with the pedal firm to the ground. Even the turbo psi only goes to about 20psi. Then after those 10 seconds, it finally kicks...
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