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Unread 07-04-2010, 07:27 AM   #1
Robbypfd
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Join Date: Feb 2007
Location: Phillipsburg, NJ
Posts: 201
93 4.0 spark plugs

What are the best spark plugs to use on a 93 4.0 ?

Thanks Rob

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Unread 07-04-2010, 08:13 AM   #2
idaholtby
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1991 YJ Wrangler 
 
Join Date: Apr 2008
Location: Meridian, Idaho
Posts: 2,554
Just us the stock recommended spark plugs. In this case Champion RC12LYC or equivalant. These motors love them and they are cheap.
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