Ignition Coil + Spark Plugs for Ford Explorer (2009-2010) 4.6L
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Direct-Replacement Ignition Coil and Platinum Spark Plug Kit for 2009-2010 Ford Explorer (U251)
What it Does: The complete ignition kit replaces degrading factory coil-on-plug packs and worn spark plugs on the 2009-2010 Ford Explorer to eliminate misfires, stabilize idle combustion, and restore factory throttle response.
The Stock Ford Explorer Ignition Breakdown
The factory coil-on-plug (COP) assemblies on the 4.6L Modular 3V engine suffer from thermal degradation over sustained operating cycles. The internal epoxy insulation weakens under continuous underhood heat soak, leading to dielectric breakdown, secondary winding failure, and micro-arcing against the aluminum cylinder head. Compounded by ground electrode erosion on high-mileage spark plugs, the widened gap demands excessive secondary voltage. This strains the primary ignition circuit, generating hesitation, reduced fuel efficiency, and P0300–P0308 diagnostic trouble codes.
The Engineering Solution
This comprehensive tune-up kit restores primary and secondary ignition integrity by pairing heavy-duty ignition coils with factory-specified Motorcraft SP509 platinum spark plugs. The direct-fit replacement coils utilize premium magnetic copper core windings sealed in high-dielectric epoxy to withstand high thermal loads and prevent voltage bleed-off. Matched with erosion-resistant platinum electrodes, the kit maintains optimal spark kernel energy across all eight cylinders, ensuring rapid flame propagation and smooth combustion under heavy towing and daily driving.
What's Included
- 8 Direct-Fit Ignition Coils
- 8 Motorcraft Platinum Spark Plugs
Technical Specifications
| Fitment | 2009-2010 Ford Explorer |
|---|---|
| Engine / Chassis | 4.6L Modular 3-Valve V8 / U251 |
| Stock Output | 292 hp / 315 lb-ft |
| Replaces OEM Part # | FD509, SP509, EBC1519, 26C1045, SKIC501, CFD509, C1659VC, 2IGC0157, 673-6200, 52-2071, C1659SPEC, 2-50107, 140033E, 140033EB, 140033EB-8, 140033EK, 140033EK-8, 1IC486, 50107, 36-8180, 5096, 2505-484845, IGC0117, E509, C1659, 022150470A, GN10233, 48874, U5260, C-800, C1659-8, C1659DLGKIT, 8L3Z12029A, 921-2007, 921-2066, 5C1716 |
Compatibility
- 2009 Ford Explorer 4.6L V8
- 2010 Ford Explorer 4.6L V8
Frequently Asked Questions & Fitment Warnings
Does this fit the U251 Explorer?
Yes, this is a direct fit for the 2009-2010 Ford Explorer equipped with the 4.6L Modular 3V engine. It is not compatible with 4.0L V6 engines or pre-2009 4.6L 2-valve/early 3-valve heads utilizing high-thread spark plug designs.
Are spark plug wires required for installation?
No, the 4.6L 3-valve configuration utilizes a direct coil-on-plug setup; each coil mounts directly above its dedicated spark plug without traditional plug wires.
The Ford Towing & Utility Standard
Built to handle sustained payload hauling and trailering demands, this ignition package delivers the consistent high-voltage delivery your Ford SUV requires under continuous load.
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