mbl22127

I've got a prob with a derate of power when accelerating occasionally. The EMI lightining bolt appears and the derate of power happens for about 3-5 secs then goes off for a bit then does it again, always in my higher gears. Thought it might have to do with the cold weather and antigel additives I use, so I changed fuel filters...didn't work, so thought maybe air flow and changed my air filter...no joy. Thinking maybe bad fuel, turbo or egr prob. Anyone's help would be much appreciated. Thanks.