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1997 - 2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

eratic idle!!

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Old Jun 7, 2005 | 10:38 AM
  #16  
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jhforman
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Originally Posted by ugotkern
Which rubber hose was it?
on the passenger valve cover there is a PCV valve that ran to the back of the intake !! its a complete PAIN to get to !! but if you trace the hard plastic line from the valve cover back it will run to a right angle rubber fitting on the back of the intake. this was dry rotted replaced it you have to remove the triton 5.4 cover to gain access to it !!
 
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Old Jun 7, 2005 | 11:09 AM
  #17  
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ugotkern
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Thanks for the reply but I had already replaced that hose and still have the same issue
 
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Old Mar 26, 2006 | 09:59 PM
  #18  
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My 97 did the exact same thing took it to Autozone and got the same reading changed out all of the 02's didnt help. Check underneath the AIC there is a vacuum line that comes out of the manifold (its a rubber elbow) they go bad easily. The Ford dealer has a complete line with PCV for around $27. Should fix the problem.
 
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