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mid rpm range

  1. Engine 911
    i have an 03 f350 4x4 6.0 and am having an issue nobody seems able to solve so far. i have owned this truck a little more than a year. i purchased it to replace my 2001 7.3 that was wrecked with over 500k . when i bought it the engine had been replaced with a factory short block buildup. NO...