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flat spot

  1. THE STUMBLE and EC ECM Enhancer

    General MC Message Board
    My 2012 Wing has the dreaded STUMBLE. Electric Connection has a new product called an ECM Enhancer designed to fix the too-lean off-idle flat spot on the newish Japanese Wings. Has anyone tried this? Anyone with the stumble able to offer a review or evaluation? Is this an upgrade for a...
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