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  1. S

    2011 Ford Explorer XLT PINGS

    I was wondering if anyone has this issue. Under light throttle while pulling out or pulling a slight grade the engine pings. It's not a loud, hard ping but none the less it pings. While it's pinging if you give it a heavy throttle it goes away instantly. If you ease up on the throttle the...
  2. S

    2011 Explorer knock/tapping noise when cold

    My 2011 Explorer XLT now makes a knocking noise when cold. It only occurs when I first start pulling out under light to moderate throttle from 1500 to 3000 rpm only when the engine is cold. After only about 1 or 2 minutes the knocking sound gradually goes away. I placed a post about this...
  3. S

    Fluttering noise when cold?

    My 2011 Explorer has a strange fluttering (or sputter) sound coming from under the hood when I first start it up when it's cold. It only does this under light to medium throttle while accellerating from a dead start. This noise only lasts for a couple of miles and gradually goes away when it is...
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