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7.3l white smoke

  1. Need HELP!!!

    Diesel Diagnostics
    I hope I am posting this in the right place, I am new to I have a 1999 F250 SD with 7.3PS, 373,000 miles was running strong and one day just died. I finally got it started again and it lopes really bad up and down between around 400 and 900 rpm at idle but only for a few seconds then...