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On a 1997 F150 , the firing orders are : 4.2 L V6 engine ( 1 - 4 - 2 - 5 - 3 - 6 ) 4.6 L and 5.4 L V8 engines ( 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 )

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17y ago

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