2 coils One coil fires the power plugs The other one fires the emission plugs on the exhaust stroke
Each cylinder has 2 plugs
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2021 F150 5.0 Screw
Past:18 F150 2.7, 16 F150 5.0, 14 F150 5.0, 07 F150 5.4, 03 Ranger 4.0
Master Certified Ford Parts / Warranty Admin
Last edited by djfllmn; 02-02-2015 at 10:12 AM.
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