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BigBob, Shop manager/technician
Category: Mercury
Satisfied Customers: 4838
Experience:  Shop Manager with 25 years experience
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Spark plug wiring diagram 1998 mercury mountaineer 5.0 liter

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Spark plug wiring diagram 1998 mercury mountaineer 5.0 liter

V8 Firing Order: 1 3 7 2 6 5 4 8

Good luck,
BigBob and 2 other Mercury Specialists are ready to help you
Customer: replied 8 years ago.
I had crosses 4 and 7 which gave me a check engine light and ran rough, disconnected the battery to reset the check engine light (it went out) but still runs rough perhaps one of the new wires or plugs is bad? I'll check them tomorrow
thank you,