di engine miss firing

  1. B

    2004 Sportster le di

    Hello All! I have a 2004 seadoo sportser le di. It runs great from idle to half throttle and from 3/4 throttle to full. 1/2 throttle to 3/4 throttle the engines seems to very breifly 'miss'. I have changed the spark plugs so far and it made no difference. Anyone have any idea's? I am going to...