On a 1997 Ford Explorer ( 4.0 liter OHV and SOHC , V6 engines )
( 1 - 4 - 2 - 5 - 3 - 6 ) is the spark plug firing order
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The engine cylinder locations are numbered :
firewall
3 - 6
2 - 5
1 - 4
front of Ford Explorer ( V6 )
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The towers on the coil pack are numbered :
Coil-----3 - 4
Pack----2 - 6
Plug----1 - 5
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