{"product_id":"ignition-coil-iridium-spark-plugs-wire-for-isuzu-ascender-2003-2004-5-3l","title":"Ignition Coil \u0026 Iridium Spark Plugs \u0026 Wire for Isuzu Ascender (2003-2004) 5.3L","description":"\u003ch2\u003eDirect-Fit Ignition Coil, Wire, and Iridium Plug Service Kit for 2003-2004 Isuzu Ascender\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Restores lost spark energy, stabilizes idle, and eliminates secondary ignition misfires across all eight cylinders under heavy load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ascender Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eFactory coil packs on the GMT370 platform suffer from severe thermal cycling and moisture intrusion over time. Located tightly along the valve covers directly above exhaust manifolds, OEM round coils develop micro-cracks in their epoxy encapsulation, causing internal dielectric breakdown. Concurrently, factory carbon-core plug wires degrade internally from persistent heat soak, causing high conductor resistance, weak spark delivery, intermittent P0300 misfire codes, and degraded towing performance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive overhaul kit features heavy-duty round-style (UF262\/D585) coil-on-plug packs sealed with premium high-dielectric epoxy and high-temp silicone boots to prevent voltage arcing. Matched with 8mm red silicone-jacketed plug wires containing stranded copper cores and stainless heat-shielded terminals, this assembly minimizes electrical resistance. Pre-gapped iridium-tipped spark plugs offer superior thermal conductance and a fine-wire electrode design that resists carbon fouling under high combustion pressures.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2003-2004 Isuzu Ascender 5.3L V8\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eVortec 5300 LM4 \/ GMT370\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e285 hp \/ 325 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eUF262, D585, 41-962, 19299585, 12192195\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003 Isuzu Ascender Base 5.3L V8 (Round UF262 \/ D585 Coils)\u003c\/li\u003e\n  \u003cli\u003e2003 Isuzu Ascender Limited 5.3L V8 (Round UF262 \/ D585 Coils)\u003c\/li\u003e\n  \u003cli\u003e2003 Isuzu Ascender LS 5.3L V8 (Round UF262 \/ D585 Coils)\u003c\/li\u003e\n  \u003cli\u003e2004 Isuzu Ascender Limited 5.3L V8 (Round UF262 \/ D585 Coils)\u003c\/li\u003e\n  \u003cli\u003e2004 Isuzu Ascender LS 5.3L V8 (Round UF262 \/ D585 Coils)\u003c\/li\u003e\n  \u003cli\u003e2004 Isuzu Ascender S 5.3L V8 (Round UF262 \/ D585 Coils)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Isuzu Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to withstand the sustained cylinder pressures and elevated thermal loads of heavy towing and off-highway duty, this ignition package delivers consistent, high-energy combustion without voltage drop or hesitation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50498319778040,"sku":"DS-ERNWV93UC","price":185.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-wire-for-isuzu-ascender-2003-2004-5-3l-1.jpg?v=1789266267","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-iridium-spark-plugs-wire-for-isuzu-ascender-2003-2004-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}