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5.4 knocks once at start

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Old Nov 18, 2007 | 07:30 PM
  #1  
dfishrmn88's Avatar
dfishrmn88
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5.4 knocks once at start

I have a '05 F150 5.4 V8 with 14,000 mi. Just bought this truck as a Certified Pre-Owned. It has a fairly loud knock when you start the truck but just one knock then fine. Does not happen all the time. Do you think this is anything to be concerned about? It is still under original warranty, should I have this checked?
 
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Old Nov 18, 2007 | 07:44 PM
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smoke n tires
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i would definitly have them check it out at the dealer if its still under warranty.
 
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Old Nov 18, 2007 | 07:59 PM
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Could be a cam phaser or something else. I would definately have it checked out under warranty!!
 
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Old Nov 29, 2007 | 06:14 PM
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FS-150
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Did you resolve this? I would try a Motorcraft oil filter in it if it does not already have one in it. A filter with the incorrect antidrainback valve can cause a dry start condition. This has been talked about in the 2004+ Forum.
 
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Old Nov 29, 2007 | 06:16 PM
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dfishrmn88
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It is all MC. Probably am going to have the dealer look at it this week.
 
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