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Old Nov 18, 2007 | 08:33 PM
  #1  
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Spark Plugs

03 f350 with 114500 miles on it. Started to miss a little on my way home tonight.
Question is what type spark plugs to use. Do i go with the factory plugs or does anyone prefer another brand?
thank You
 
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Old Nov 18, 2007 | 08:38 PM
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Ford truck = Motorcraft/Autolite plugs.
 
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Old Nov 18, 2007 | 09:49 PM
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Bet you got a COP going bad.
 
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Old Nov 18, 2007 | 10:09 PM
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Ford/Motorcraft
 
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Old Nov 18, 2007 | 11:01 PM
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Originally Posted by khadma
Ford truck = Motorcraft/Autolite plugs.
What khadma said...

Just a friendly tip: But since you are going to change the plugs...change the COP boots while you are at it.


biz
 
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Old Nov 19, 2007 | 08:02 AM
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You say it is just missing "a little." As in ... when you give it a little gas? If so, that is a "light load miss," and very well may be one of the COP's (coils). It is not rare.

Also, I don't know when Ford changed the cyl heads (others here will know), but are you aware of the spitting spark plugs? Use great care when installing the new plugs ---- torque wrench and most people seem to stay with Motorcraft plugs.

Also, blow out the spark plug well before you remove the plug, I've had debris/water down in there that could fall into the cylinder.

Also, liberal amount of dielectic grease at the COP boot-spark plug contact areas.

Good luck.
 
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Old Nov 19, 2007 | 08:27 PM
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From: oakville,wa
A little miss turned into a very noticable miss tonight.
Will replace plugs with motorcraft and cop boots before I start replacing cop's
Thank you all for the info.
 
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