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2002 Ford F-150

Question: has high idle

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J Dwyer, 5.4L V8, Fordyce, NE, April 09, 2009, 08:58

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won't come down from 1100 rpm, got new IAC valve, did not fix,

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• Answer #1

  Bret Bodas April 09, 2009, 10:20
  

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  Make sure the throttle valve settings are correct and that the throttle cable is adjusted properly. Check for DTC's too.
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• Answer #2

  dandd April 09, 2009, 10:25
  

   Master

  You may have a vacuum leak which is allowing air past the throttle body. Look for a broken or disconnected vacuum line. Do you have a Service Engine Soon Light on?
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