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  1. C

    spark plug gap

    The 0.061-0.068 gap comes from the Ford OEM Service DVDs for 2003, 04 & 05, for the 4.0L Explorer, Explorer Sport-Trac, Mountaineer & Ranger, originally equipped with the Motorcraft AGSF22PM plug. Interestingly, in 2005, the Mustang started using the same 4.0L engine. In that application, the...
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