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Spark plug NGK

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Old May 7, 2017 | 06:39 AM
  #1  
shangopat's Avatar
shangopat
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From: Antwerp, Belgium
Spark plug NGK

Hey guys,

Have a 1998 f150 5.4l truck, and changed my plugs last week, and also the cops.
Problem is the engine is not running smooth,idle is ok, but when i drive at a constant speed, i have a feeling that there is a misfire, but according the odb reader there is none.
So i found out that my local shop ordered the wrong plugs (NGK tr6 ix) which are for CNG, while i drive with LPG.
Could the plugs be the problem ?
Don't like to change them again , because this is a F******* job.

thanks for reading
Pat
 
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Old May 9, 2017 | 10:08 PM
  #2  
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fordmerc
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I would replace the plugs with motorcraft. That's what these engines like!
 
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Old May 13, 2017 | 07:58 PM
  #3  
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kendall66
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Joined: Sep 2011
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From: northwest iowa
this engine likes motorcraft. different plugs may run the engine too lean and cause overheating.
 
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