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I have 85,000 mls on 05 6.0 dsl the other night while towing my trailer i noticed a loss of power after about 3 hrs of driving. when i left a stop sign i had no power( motor loading up).
as motor ramped up power came back? Now it is doing this all the time.
At low rpm it spews black smoke and has no power, as the rpms go up the power comes back fine? this is my 3rd pwrstroke and i have never had this happen?