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    Engine Shacking - Knocking on Uphill

    Hi everyone, I need help! I have a 2011 Expedition 5.4 with 45,000 miles. It all started during a trip — when going uphill and accelerating at low RPMs, I could hear engine knocking (pinging). Later, I got stuck in traffic and noticed the car shaking. I lightly pressed the gas in neutral and...
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