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Old 07-21-2015, 12:12 PM
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2012 Grand Cherokee Limited 5.7

Hi, new here.

Recently bought this Jeep and have noticed a humming sound when the ECO appears in the message center.

Stepping on the gas pedal slightly to increase speed, the sounds goes away and ECO also goes

I'm assuming it's the motor dropping off cylinders creating that sound

Advise to ease the concern appreciated

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