{"product_id":"ignition-coil-spark-plugs-for-cadillac-eldorado-seville-1997-1999-4-6l","title":"Ignition Coil + Spark Plugs for Cadillac Eldorado Seville (1997-1999) 4.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Ignition Coil \u0026amp; Spark Plug Kit for 1997-1999 Cadillac Eldorado, Seville (E-Body \/ K-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and spark plug service kit restores high-voltage secondary ignition output on 1997-1999 Cadillac Eldorado and Seville models to eliminate cylinder misfires, rough idle, and unburned fuel dumping into catalytic converters.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Cadillac Eldorado, Seville Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e4.6L Northstar L37 \/ LD8\u003c\/strong\u003e engine operates in a compact, thermally saturated transverse engine bay. Over extended heat cycles, factory waste-spark coil packs suffer internal dielectric breakdown of the secondary windings, tracking failure, and casing micro-fractures. In a waste-spark setup where one pack fires two companion cylinders simultaneously, degradation in a single coil pack immediately induces multi-cylinder misfires under high-load acceleration. Compounding this, aged plugs suffer spark erosion, increasing the required firing voltage across the electrode gap beyond what degraded coils can bridge.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement ignition kit pairs calibrated high-dielectric epoxy-encapsulated coil packs with genuine NGK spark plugs engineered to factory thermal ranges. Built to match OEM secondary impedance and primary saturation times, these coils resist high-voltage flashover under extended heat soak. Combined with NGK plugs featuring trivalent metal plating to halt anti-seizing and corrosion, this kit guarantees consistent flame-front propagation, stabilizes idle RPM, and eliminates load-dependent misfire codes.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e3 Ignition Coils\u003c\/li\u003e\n  \u003cli\u003e6 NGK 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;\"\u003e1997-1999 Cadillac Eldorado, Seville\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;\"\u003e4.6L Northstar (L37 \/ LD8) \/ E-Body, K-Body\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;\"\u003e275-300 hp \/ 295-300 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;\"\u003eDR39, D546, 5C1077, E219, 52-1693, IC406, 1106008, DR-47, 1103646, 11037\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\u003e1997-1999 Cadillac Eldorado 4.6L\u003c\/li\u003e\n  \u003cli\u003e1997-1999 Cadillac Seville 4.6L\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 E-Body \/ K-Body Eldorado, Seville?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1997-1999 Cadillac Eldorado and Seville equipped with the \u003cstrong\u003e4.6L Northstar\u003c\/strong\u003e engine; verify your coil connector style before purchasing as this is not a universal kit.\u003c\/p\u003e\n\n\u003ch4\u003eAre spark plug wires included with this kit?\u003c\/h4\u003e\n\u003cp\u003eNo, secondary ignition wires are not included and must be inspected or purchased separately if deteriorated.\u003c\/p\u003e\n\n\u003ch3\u003eThe Cadillac Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to deliver factory-level spark output without triggering nuisance secondary circuit DTCs, preserving the smooth, high-output luxury power delivery expected from Cadillac V8 engineering.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67562434494712,"sku":"DS-ED740ZP4X","price":102.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-cadillac-eldorado-seville-1997-1999-4-6l-1.jpg?v=1790981015","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-spark-plugs-for-cadillac-eldorado-seville-1997-1999-4-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}