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  1. 99-03 7.3L Powerstroke Problems
    I have and 03 7.3 with the 4r100, exhaust, and a superchip. at 3/4 throttle it runs great good power, but at full throttle the power drops off and it revs way up. I have tried unplugging the red line to the wastgate but still the the same thing, I have recently changed the ff and air filter and...
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