{"product_id":"4c3z9a543aarm-genuine-international®-high-pressure-oil-pump-for-ford-2003-04-6-0l","title":"4C3Z9A543AARM | Genuine International® High Pressure Oil Pump For Ford 2003-04 6.0L","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003cbr\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003eA High Pressure Pump\u003cstrong\u003e 4C3Z9A543AARM \u003c\/strong\u003eis a type of pump designed to move fluids—usually fuel or oil—at very high pressure, typically for engines or hydraulic systems that require precision and force. High Pressure Oil Pump For Ford 2003-04 6.0L \u003cspan\u003ePower Stroke\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003ePart Number\u003cspan\u003e:\u003c\/span\u003e\u003c\/strong\u003e 4C3Z9A543AARM, 4C3Z-9A543-AARM\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003cspan\u003e: New\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003eManufacture\/Brand\u003c\/strong\u003e\u003cspan\u003e: International®\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFits 4C3Z9A543AARM \u003c\/strong\u003eFor \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e2003-2004 Ford E-350 Van 6.0L\u003cbr\u003e2003-2004 Ford E-450 Van 6.0L\u003cbr\u003e2003-2004 Ford Excursion 6.0L\u003cbr\u003e2003-2004 Ford F-250 Pickup\u003cbr\u003e2003-2004 Ford F-350 Pickup\u003cbr\u003e2003-2004 Ford F-450 Pickup\u003cbr\u003e2003-2004 Ford F-550 Pickup\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003cstrong data-end=\"597\" data-start=\"585\"\u003ePurpose of using 4C3Z9A543AARM:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003ch4 data-start=\"494\" data-end=\"543\"\u003e1. Power the Injectors (in HEUI Systems)\u003c\/h4\u003e\n\u003cul data-start=\"544\" data-end=\"785\"\u003e\n\u003cli data-start=\"544\" data-end=\"624\"\u003e\n\u003cp data-start=\"546\" data-end=\"624\"\u003eThe \u003cstrong data-start=\"550\" data-end=\"583\"\u003eHigh Pressure Oil Pump (HPOP)\u003c\/strong\u003e creates oil pressure (up to ~3,000 psi).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"625\" data-end=\"722\"\u003e\n\u003cp data-start=\"627\" data-end=\"722\"\u003eThat oil pressure \u003cstrong data-start=\"645\" data-end=\"674\"\u003edrives the fuel injectors\u003c\/strong\u003e, which inject fuel into the combustion chamber.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"723\" data-end=\"785\"\u003e\n\u003cp data-start=\"725\" data-end=\"785\"\u003eWithout this pump, the engine \u003cstrong data-start=\"755\" data-end=\"784\"\u003ecannot inject fuel or run\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"787\" data-end=\"828\"\u003e2. Enable Precise Fuel Injection\u003c\/h4\u003e\n\u003cul data-start=\"829\" data-end=\"1019\"\u003e\n\u003cli data-start=\"829\" data-end=\"924\"\u003e\n\u003cp data-start=\"831\" data-end=\"924\"\u003eElectronic control modules regulate injection timing\/amount by controlling high-pressure oil.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"925\" data-end=\"1019\"\u003e\n\u003cp data-start=\"927\" data-end=\"1019\"\u003eThis allows for \u003cstrong data-start=\"943\" data-end=\"969\"\u003ebetter fuel efficiency\u003c\/strong\u003e, \u003cstrong data-start=\"971\" data-end=\"990\"\u003elower emissions\u003c\/strong\u003e, and \u003cstrong data-start=\"996\" data-end=\"1018\"\u003esmoother operation\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1021\" data-end=\"1054\"\u003e3. Cold Start Assistance\u003c\/h4\u003e\n\u003cul data-start=\"1055\" data-end=\"1185\"\u003e\n\u003cli data-start=\"1055\" data-end=\"1120\"\u003e\n\u003cp data-start=\"1057\" data-end=\"1120\"\u003eCold engines require \u003cstrong data-start=\"1078\" data-end=\"1101\"\u003ehigher oil pressure\u003c\/strong\u003e to fire injectors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1121\" data-end=\"1185\"\u003e\n\u003cp data-start=\"1123\" data-end=\"1185\"\u003eThe HPOP ensures there's enough pressure even during cranking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1187\" data-end=\"1225\"\u003e4. Supports Emissions Control\u003c\/h4\u003e\n\u003cul data-start=\"1226\" data-end=\"1308\"\u003e\n\u003cli data-start=\"1226\" data-end=\"1308\"\u003e\n\u003cp data-start=\"1228\" data-end=\"1308\"\u003ePrecise fuel metering via high-pressure injection helps the engine burn cleaner.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eSigns of a Bad High Pressure Oil Pump 4C3Z9A543AARM\u003c\/strong\u003e: \u003cbr\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cul\u003e\n\u003cli data-start=\"374\" data-end=\"510\"\u003e\n\u003cp data-start=\"377\" data-end=\"406\"\u003e\u003cstrong data-start=\"377\" data-end=\"406\"\u003eHard Starting or No Start\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"410\" data-end=\"510\"\u003e\n\u003cli data-start=\"410\" data-end=\"458\"\u003e\n\u003cp data-start=\"412\" data-end=\"458\"\u003eCranks, but doesn't fire—especially when cold.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"462\" data-end=\"510\"\u003e\n\u003cp data-start=\"464\" data-end=\"510\"\u003eNot enough oil pressure to activate injectors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"512\" data-end=\"647\"\u003e\n\u003cp data-start=\"515\" data-end=\"532\"\u003e\u003cstrong data-start=\"515\" data-end=\"532\"\u003eLoss of Power\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"536\" data-end=\"647\"\u003e\n\u003cli data-start=\"536\" data-end=\"593\"\u003e\n\u003cp data-start=\"538\" data-end=\"593\"\u003eFeels sluggish, won’t rev properly, lacks acceleration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"597\" data-end=\"647\"\u003e\n\u003cp data-start=\"599\" data-end=\"647\"\u003eCan’t maintain required oil pressure under load.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"649\" data-end=\"729\"\u003e\n\u003cp data-start=\"652\" data-end=\"664\"\u003e\u003cstrong data-start=\"652\" data-end=\"664\"\u003eStalling\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"668\" data-end=\"729\"\u003e\n\u003cli data-start=\"668\" data-end=\"729\"\u003e\n\u003cp data-start=\"670\" data-end=\"729\"\u003eEngine starts but then dies, especially at idle or low RPM.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"731\" data-end=\"824\"\u003e\n\u003cp data-start=\"734\" data-end=\"767\"\u003e\u003cstrong data-start=\"734\" data-end=\"767\"\u003eEngine Misfires or Rough Idle\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"771\" data-end=\"824\"\u003e\n\u003cli data-start=\"771\" data-end=\"824\"\u003e\n\u003cp data-start=\"773\" data-end=\"824\"\u003eInconsistent firing due to poor injector operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"826\" data-end=\"973\"\u003e\n\u003cp data-start=\"829\" data-end=\"878\"\u003e\u003cstrong data-start=\"829\" data-end=\"878\"\u003eLow ICP (Injection Control Pressure) Readings\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"882\" data-end=\"973\"\u003e\n\u003cli data-start=\"882\" data-end=\"973\"\u003e\n\u003cp data-start=\"884\" data-end=\"973\"\u003eDiagnostic scan shows low pressure from HPOP (even when IPR is commanding high pressure).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"975\" data-end=\"1189\"\u003e\n\u003cp data-start=\"978\" data-end=\"1016\"\u003e\u003cstrong data-start=\"978\" data-end=\"1016\"\u003eCheck Engine Light \/ Trouble Codes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1020\" data-end=\"1189\"\u003e\n\u003cli data-start=\"1020\" data-end=\"1189\"\u003e\n\u003cp data-start=\"1022\" data-end=\"1033\"\u003eCodes like:\u003c\/p\u003e\n\u003cul data-start=\"1039\" data-end=\"1189\"\u003e\n\u003cli data-start=\"1039\" data-end=\"1080\"\u003e\n\u003cp data-start=\"1041\" data-end=\"1080\"\u003e\u003cstrong data-start=\"1041\" data-end=\"1050\"\u003eP1211\u003c\/strong\u003e, \u003cstrong data-start=\"1052\" data-end=\"1061\"\u003eP1283\u003c\/strong\u003e – ICP out of range\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1086\" data-end=\"1144\"\u003e\n\u003cp data-start=\"1088\" data-end=\"1144\"\u003e\u003cstrong data-start=\"1088\" data-end=\"1097\"\u003eP2290\u003c\/strong\u003e, \u003cstrong data-start=\"1099\" data-end=\"1108\"\u003eP2291\u003c\/strong\u003e – Injector control pressure too low\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1150\" data-end=\"1189\"\u003e\n\u003cp data-start=\"1152\" data-end=\"1189\"\u003e\u003cstrong data-start=\"1152\" data-end=\"1161\"\u003eP1212\u003c\/strong\u003e – ICP not at expected level\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1191\" data-end=\"1261\"\u003e\n\u003cp data-start=\"1194\" data-end=\"1207\"\u003e\u003cstrong data-start=\"1194\" data-end=\"1207\"\u003eOil Leaks\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1211\" data-end=\"1261\"\u003e\n\u003cli data-start=\"1211\" data-end=\"1261\"\u003e\n\u003cp data-start=\"1213\" data-end=\"1261\"\u003eLeaks from the HPOP housing, fittings, or lines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1263\" data-end=\"1426\"\u003e\n\u003cp data-start=\"1266\" data-end=\"1293\"\u003e\u003cstrong data-start=\"1266\" data-end=\"1293\"\u003eHigh IPR % with Low ICP\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1297\" data-end=\"1426\"\u003e\n\u003cli data-start=\"1297\" data-end=\"1426\"\u003e\n\u003cp data-start=\"1299\" data-end=\"1426\"\u003eIf the IPR (Injection Pressure Regulator) is near 100% but ICP (Injection Control Pressure) is low, the HPOP is likely failing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-end=\"476\" data-start=\"97\"\u003e\u003cstrong data-end=\"151\" data-start=\"97\"\u003e\u003cbr\u003eAbout the Manufacturer – International \/ Navistar:\u003c\/strong\u003e\u003cbr data-end=\"154\" data-start=\"151\"\u003eInternational, a brand of \u003cstrong data-end=\"218\" data-start=\"180\"\u003eNavistar International Corporation\u003c\/strong\u003e, is a leading American manufacturer of commercial trucks, buses, and diesel engines. With a history dating back to the early 1900s, International is known for producing durable and reliable vehicles used in freight, construction, and municipal operations.\u003c\/p\u003e\n\u003cp data-end=\"707\" data-start=\"478\"\u003eNavistar has built a strong reputation in the trucking industry by focusing on innovation, performance, and long-term dependability. Their vehicles and components are trusted by fleets and drivers across North America and beyond.\u003c\/p\u003e","brand":"International®","offers":[{"title":"Default Title","offer_id":50660569546999,"sku":"4C3Z9A543AARM","price":989.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/7080\/3959\/files\/photo_2026-04-04_01-51-39_d6452642-a9b6-42c3-a43b-f2765dd29bad.jpg?v=1775274374","url":"https:\/\/forcetruckparts.com\/products\/4c3z9a543aarm-genuine-international%c2%ae-high-pressure-oil-pump-for-ford-2003-04-6-0l","provider":"Force Truck Parts","version":"1.0","type":"link"}