Ignition Coil and Iridium Spark Plugs for Ford Expedition (2005-2013) 5.4L

Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2005-2013 Ford Expedition

What it Does: Replaces degraded factory coil-on-plug boots and fouled spark plugs to eliminate misfires, stabilize idle speed, and restore complete combustion efficiency across all eight cylinders under heavy load.

The Stock Expedition Ignition Breakdown

The 3-valve 5.4L Triton engine subjects ignition components to intense thermal cycling within deep cylinder head wells. Over time, factory secondary coil windings degrade, epoxy insulation develops micro-fractures, and high resistance leads to spark blowout, erratic idling, and diagnostic trouble codes (P0300-P0308). Worn OEM electrodes further increase electrical resistance, overloading the primary ignition circuit during acceleration and towing.

The Engineering Solution

This complete tune-up kit features heavy-duty coil-on-plug assemblies engineered with high-conductivity copper windings, heat-resistant silicone boots, and direct-fit blade terminals. Paired with fine-wire iridium spark plugs, this package provides superior thermal tolerance, lower required firing voltage, and high dielectric strength to resist carbon tracking and withstand continuous combustion heat under load.

Technical Specifications

Compatibility

• 2005-2013 Ford Expedition 5.4L V8 (All Trims: XLT, Eddie Bauer, Limited, King Ranch, Max)

The Ford Towing Standard

Engineered to meet the thermal and electrical demands of full-size SUV towing, this direct-fit ignition kit ensures reliable cold starts, clean high-load combustion, and consistent power delivery across heavy payload cycles.