Ford 7.3L Power Stroke Injector | Code AE Long Lead #8 | 1999-2003 | Torque Diesel | Remanufactured

Torque Diesel remanufactured HEUI fuel injector, code AE, for 1999–2003 Ford 7.3L Power Stroke and 2002–2003 Navistar T444E engines. This is the long lead injector for cylinder #8 only — one per engine. Cylinders #1 through #7 use the code AD injector. The AE injector has modified internal oil passages and injection timing to address the knocking or "cackle" noise that can occur at the rear cylinder, per Ford TSB 00-22-1. Navistar references it as 1833640C1 and Ford as F81Z-9E527-EARM.

Key Features

• Long lead design for cylinder #8, addressing the oil-fill delay caused by the rear cylinder's distance from the high-pressure oil pump
• Modified internal oil passages and injection timing per Ford's updated calibration
• Completely disassembled and inspected — any component outside OEM spec is replaced, then components are cleaned and re-inspected
• 100% nozzle replacement on every unit
• 100% end-of-line tested on OEM test equipment, to OEM specification, by OEM-trained technicians
• Restores OE fuel atomization and fuel delivery

Specifications

• Calibration code: AE
• Cylinder position: #8 only
• Lead type: Long lead (identified by an "LL" stamp and a blue harness connector)
• Navistar OE reference: 1833640C1
• Ford OE reference: F81Z-9E527-EARM
• Component type: HEUI fuel injector
• Condition: Remanufactured
• Fuel system: HEUI — hydraulically actuated, electronically controlled unit injector
• Engines: Ford 7.3L Power Stroke and Navistar T444E, 444 cu in V8
• Sold as: each — one required per engine, cylinder #8

Warranty

Two-year unlimited-mileage warranty covering defects in materials and workmanship, plus up to $750 in labor coverage. Claims are handled through your local M&D location or the M&D warranty team.

Compatibility & Fitment

• Ford F-Series, 1999–2003 — engine serial 661,496 to 896,812
• Ford E-Series, 1999–2003 — engine serial 661,974 to 896,812
• Navistar T444E, 2002–2003 — engine serial 1,313,828 to 5,999,999

Fitment gate — this injector fits cylinder #8 only. If you are replacing all eight injectors, you need seven code AD injectors for cylinders #1 through #7 plus one of these for cylinder #8. Ordering eight AE injectors will leave you with the wrong part for seven cylinders.

Second fitment gate — confirm your existing cylinder #8 injector carries the "LL" long lead marking. Some engines were built without it. If yours does not have the long lead injector, confirm with your engine serial number before ordering.

Third fitment gate — 1994–1998 engines use the code AA single-shot injector, and 1997 California and early 1999 engines use the code AB. Confirm your engine serial number falls within the ranges above.

Installation note — HEUI injectors depend on correct fuel supply pressure. Confirm fuel pressure is within 60 to 70 psi as part of the job, since low supply pressure will shorten injector life.

Also referenced as: 1833639C1, 1833644C1, 1833645C1, 1833646C92

Conclusion

This is a Torque Diesel remanufactured code AE long lead HEUI injector for cylinder #8 on 1999–2003 Ford 7.3L Power Stroke and 2002–2003 Navistar T444E engines. It carries Ford's updated long lead calibration to address the rear-cylinder knocking noise documented in TSB 00-22-1. One is required per engine — order seven code AD injectors alongside it if you are doing a full set.