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  1. What could be causing "fluttering" under load?

    6.0L Performance Parts Discussion
    Lots of good post and replies, but none found as of yet for my problem. I have a 2004 F350 6.0L work truck that has been getting worse over the past year or so with fluttering under power. It sounds the same as when you let off the throttle after pulling hard, but in this case it's while you...
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