Ignition Coils & Spark Plugs for Ford Explorer (2002-2005) 4.6L

High-Output Ignition Coils & Spark Plugs for 2002-2005 Ford Explorer (Modular 4.6L / U152)

What it does: Replaces degrading factory ignition components with high-output ignition coils and precision spark plugs to restore consistent spark delivery, reduce misfires, and stabilize idle in the 4.6L Modular V8.

The Stock Explorer Ignition Weakness

The factory ignition coils on the 2002-2005 U152 Explorer, specifically the early-generation COP (Coil-On-Plug) units, are notoriously susceptible to thermal degradation and moisture intrusion. Positioned directly over the spark plugs in the Modular 4.6L V8's deep cylinder head wells, these OEM coils suffer from severe heat soak over thousands of heat cycles. This prolonged exposure degrades the internal epoxy potting and internal primary windings, eventually leading to secondary voltage leaks. Furthermore, failing coil boots allow moisture to collect, resulting in carbon tracking, high-rpm misfires, hesitation under towing loads, and a severe drop in overall combustion efficiency.

The Engineering Solution

This comprehensive ignition coil and spark plug kit addresses OEM thermal shortcomings through upgraded internal materials and superior external insulation. The coils feature high-temperature conductive silicone boots and enhanced dielectric epoxy potting that resists breakdown under extreme under-hood temperatures. Upgraded primary and secondary copper windings reduce internal resistance, ensuring a hotter, more stable spark output that resists blowout under load. Paired with performance-grade spark plugs designed for optimal heat dissipation and complete fuel burn, this ignition overhaul restores factory torque delivery, optimizes fuel atomization, and completely eliminates the stuttering associated with degraded COP ignition systems.

Technical Specifications

Compatibility

• 2002 Ford Explorer 4.6L V8
• 2003 Ford Explorer 4.6L V8
• 2004 Ford Explorer 4.6L V8
• 2005 Ford Explorer 4.6L V8

The Ford Durability Standard

Engineered to handle the heavy towing and hauling demands of the third-generation SUV chassis, this ignition upgrade guarantees long-lasting reliability and sustained power when pulling trailers or navigating rugged terrain.