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The spark plug firing order on a Mercury Mountaineer 4.0 liter V6 engine is :

( 1 - 4 - 2 - 5 - 3 - 6 )

The engine cylinder locations are numbered :

firewall

3 - 6

2 - 5

1 - 4

front of vehicle

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The coil pack towers are numbered :

coil----3 - 4

pack---2 - 6

plug----1 - 5

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12y ago

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