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Howling noise from engine.

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Old Apr 2, 2006 | 11:18 AM
  #1  
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triton54
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Howling noise from engine.

Last ight my 97 5.4 Expy began to howl like no other. I opened the hood and my best assumption was somewhere around the EGR is where it was coming from. Its never done this before. Is it possible that the valve got stuck in the open/close position and caused this or should I look elsewhere. EGR looks like the original and I'm running at 133,000 miles strong.
 
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Old Apr 2, 2006 | 07:28 PM
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A howling is usually the idler pulley.
 
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Old Apr 2, 2006 | 10:12 PM
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it only did it last night for 20 min. or so. $12 dollar part so i'll give it a shot thanks for the input.
 
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Old Apr 3, 2006 | 09:59 AM
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fixed....prior owner jerry rigged a weak piece of hose to the IAC Valve hose, it was collapsing under hot conditions and howling.
 
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