Question about 1999 Ford Explorer

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Humbing noise from breather

I have a 98 ford explorer sport 4.0 L. EFI When it gets hot outside it makes a loud humbing/roaring sound from the breather and when you accelerate it stops, only does it at idle. What would be the problem??


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  • lmayo1902 Aug 15, 2008

    what do you do to get reid of the problem.

  • geeeeebee Aug 22, 2008

    In hot weather, after it has been running for a while, it howls when idling, of operating a low speed. Sound goes away at higher rpm.

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  • Ford Master
  • 6,674 Answers

Have you given the throttle body intake a good cleaning ?

Posted on Aug 30, 2008

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http://autorepair.about.com/library/firing_orders/bl-ford-firing-98.htm

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