{"product_id":"ignition-coil-and-iridium-spark-plugs-for-ford-expedition-2018-2021-3-5l","title":"Ignition Coil and Iridium Spark Plugs for Ford Expedition (2018-2021) 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Output Ignition Coil and Iridium Spark Plugs for 2018-2021 Ford Expedition (U553)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Ignition Coil and Iridium Spark Plugs kit restores secondary ignition voltage and combustion stability across all cylinders on the 2018-2021 Ford Expedition to eliminate misfires under heavy boost.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford Expedition Ignition System Weakness\u003c\/h3\u003e\n\u003cp\u003eThe twin-turbocharged direct-injected \u003cstrong\u003e3.5L EcoBoost\u003c\/strong\u003e engine subjects primary and secondary ignition components to intense thermal stress and elevated cylinder pressures. Over time, high combustion pressures increase the resistance required to jump the spark gap. The factory coil-on-plug (COP) assemblies suffer from dielectric degradation within the internal epoxy windings and thermal fatigue in the silicone boots. Under load or boost ramp-up, weak spark discharge leads to spark blowout, hesitations, diminished fuel efficiency, and standard cylinder misfire diagnostic trouble codes (P0300–P0306).\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis complete tune-up kit resolves high-load misfires by matching six high-dielectric epoxy-filled ignition coils with fine-wire iridium spark plugs. The coils feature heat-resistant silicone boots, copper core windings, and factory 3-blade electrical terminals designed to withstand severe thermal cycling. The paired iridium plugs utilize a laser-welded fine-wire center electrode that lowers the required strike voltage and exhibits superior erosion resistance compared to standard copper or platinum alternatives, ensuring reliable spark kernel propagation under maximum twin-turbo boost.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e6 Black Ignition Coils (3-Blade Connector)\u003c\/li\u003e\n  \u003cli\u003e6 Iridium Spark Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2018-2021 Ford Expedition\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e3.5L EcoBoost V6 (Gen 2) \/ \u003cstrong\u003eU553\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e375–400 hp \/ 470–480 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eUF826\u003c\/strong\u003e, \u003cstrong\u003eHL3Z-12029-A\u003c\/strong\u003e, HL3Z12029A, HU7E-12A402-AA, HU7E12A402AA, HL3E-12A366-AB, HL3E12A366AB, 5413015, 36-8330, 368330, E1326, \u003cstrong\u003eDG-560\u003c\/strong\u003e, DG560, GN10892, IC933, IGNB10067, 5C2268, EBC1337, C-1108, IGC0215\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2018-2021 Ford Expedition 3.5L V6 Twin Turbo EcoBoost (Standard and MAX Chassis; XLT, Limited, King Ranch, Platinum)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the U553 Expedition?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2018-2021 Ford Expedition equipped with the \u003cstrong\u003e3.5L EcoBoost\u003c\/strong\u003e Gen 2 engine. \u003cstrong\u003eThis kit does not fit 2015-2017 first-generation 3.5L EcoBoost engines due to coil mounting and connector differences.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need dielectric grease during installation?\u003c\/h4\u003e\n\u003cp\u003eApplying a thin film of dielectric grease to the interior lip of the boots ensures complete moisture sealing and prevents thermal boot adhesion to the spark plug ceramic body.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eMoving a full-size SUV under heavy payload or gross trailer weight requires uninterrupted low-end torque. This direct ignition overhaul guarantees reliable flame propagation and complete fuel atomization to sustain maximum towing capability without detonation or misfires.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68083577651448,"sku":"DS-E8LAGQLP1","price":137.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-and-iridium-spark-plugs-for-ford-expedition-2018-2021-3-5l-1.jpg?v=1794528345","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-and-iridium-spark-plugs-for-ford-expedition-2018-2021-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}