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Posted on Jun 27, 2011
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I have a 2002 Jeep Grand Cherokee Laredo 4.0 Straight 6 and when you turn it on it will idle extremely high, also there's a loud ticking/knocking noise coming from under the hood and cannot figure out what it is...no codes are coming up for either

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Pablo Gonzalez

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  • Master 733 Answers
  • Posted on Jun 27, 2011
Pablo Gonzalez
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Sounds like you have a serious vaccum leak. check all your vaccum lines for tears.

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