{"product_id":"ignition-coil-spark-plugs-for-mitsubishi-eclipse-1997-1999-2-0l-non-turbo","title":"Ignition Coil + Spark Plugs for Mitsubishi Eclipse (1997-1999) 2.0L Non-Turbo","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Ignition Coil Pack and NGK Ruthenium Spark Plug Kit for 1997-1999 Mitsubishi Eclipse (D31A)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil pack and NGK Ruthenium spark plug kit replaces deteriorating factory ignition components on the 1997-1999 Mitsubishi Eclipse to eliminate misfires, restore lost combustion efficiency, and stabilize high-RPM spark output.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Mitsubishi Eclipse Waste-Spark Degradation\u003c\/h3\u003e\n\u003cp\u003eThe naturally aspirated \u003cstrong\u003eChrysler 420A\u003c\/strong\u003e engine relies on a single dual-tower waste-spark ignition coil mounted directly above high-heat exhaust and cylinder head runners. Over decades of thermal cycling, the internal transformer potting dries out and develops micro-fractures in the secondary winding insulation. This thermal stress induces internal arc flashovers and secondary voltage drop under load, showing up as low-RPM hesitation, erratic idle, and ignition breakup near wide-open throttle. Concurrently, standard copper or aged platinum plugs suffer electrode erosion, widening the spark gap and forcing an already taxed coil to draw excessive primary amperage.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement pack features an epoxy-potted secondary winding resistant to thermal shock, ensuring constant dielectric strength and consistent dwell recovery across the entire rev range. Paired with \u003cstrong\u003eNGK Ruthenium HX\u003c\/strong\u003e spark plugs, the assembly drops the required ionization voltage significantly. Ruthenium high-durability alloy tips resist spark erosion and oxidation under harsh combustion pressures far better than traditional iridium or platinum, maintaining a precise electrode gap. This restores crisp ignition timing, guarantees complete burn dynamics in the combustion chamber, and preserves primary circuit integrity across the powertrain control module (PCM).\u003c\/p\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 Mitsubishi Eclipse\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;\"\u003e\n\u003cstrong\u003e420A DOHC\u003c\/strong\u003e \/ \u003cstrong\u003eD31A\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;\"\u003e140 hp \/ 130 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\u003e4609103\u003c\/strong\u003e, \u003cstrong\u003e56032521\u003c\/strong\u003e, \u003cstrong\u003eUF183\u003c\/strong\u003e, \u003cstrong\u003eUF189\u003c\/strong\u003e\n\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 Mitsubishi Eclipse RS 2.0L Non-Turbo (\u003cstrong\u003e420A\u003c\/strong\u003e DOHC)\u003c\/li\u003e\n  \u003cli\u003e1997-1999 Mitsubishi Eclipse GS 2.0L Non-Turbo (\u003cstrong\u003e420A\u003c\/strong\u003e DOHC)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the D31A Eclipse?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1997-1999 Mitsubishi Eclipse equipped with the \u003cstrong\u003e420A\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eDoes this kit include spark plug wires?\u003c\/h4\u003e\n\u003cp\u003eNo, this service kit includes the 4-terminal waste-spark coil pack and four NGK Ruthenium HX plugs; high-tension ignition wires must be inspected or sourced separately.\u003c\/p\u003e\n\n\u003ch3\u003eThe Mitsubishi Sport Compact Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to deliver clean, uncompromised spark delivery to the 2G Eclipse platform, restoring sharp throttle response, flat-out rev stability, and peak combustion efficiency without fault codes.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67524631068920,"sku":"DS-EX5VTMM5J","price":132.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-mitsubishi-eclipse-1997-1999-2-0l-non-turbo-1.jpg?v=1790460672","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-mitsubishi-eclipse-1997-1999-2-0l-non-turbo","provider":"Performance Chip Tuning","version":"1.0","type":"link"}