- MHD Part #: AP63803AD
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- Brand: ALLIANT POWER
Alliant Power AP63803AD HEUI Injector
Alliant Power AP63803AD is a 100% new HEUI split‑shot injector for Ford 7.3L Power Stroke engines in 1999–2003 F‑Series and E‑Series applications built after 12/07/1998. Each unit is end‑of‑line tested and ships with seals pre‑installed for a faster, leak‑free install. It is a direct OEM replacement and includes a 2‑year, unlimited‑mileage parts warranty.
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Direct-fit 7.3L replacement: The Alliant Power AP63803AD is a 100% new HEUI prime (split‑shot) injector engineered as an OEM replacement for Ford 7.3L Power Stroke applications in 1999–2003 F‑Series and E‑Series vehicles built after December 7, 1998. It cross-references F81Z‑9E527‑CRM and 5C3Z‑9VE527‑BRM. Each injector ships install‑ready with three body O‑rings, one cushion ring, and a nozzle tip chamber gasket pre‑installed. A refundable core surcharge applies. Parts are backed by a 2‑year, unlimited‑mileage warranty.
Validated performance and service guidance: Every AP63803AD undergoes 100% end‑of‑line testing for fuel delivery, injection timing, peak injection pressure, and assembly leakage to ensure consistent performance. For complete sets on engines built after 12/07/1998, use a long‑lead #8 cylinder injector (AP63804AE, blue connector) per Ford service bulletins 00‑10‑1 and 01‑14‑6 to address “cackle.” During installation, verify system conditions: fuel pressure 60–70 psi, IDM voltage 120 V, and low‑pressure oil pressure ≥30 psi for proper injector operation.
Application coverage: Intended for Ford F‑250/F‑350 Super Duty, E‑350, and Excursion 7.3L Power Stroke platforms from 1999–2003 that meet the build-date requirement. As a direct‑fit replacement, the split‑shot design maintains OE calibration for smooth idle quality and correct combustion control in these applications.
Product Features
- 100% new HEUI construction for consistent metering and durability without reman variability.
- Prime split‑shot calibration matches OE strategy for smooth idle quality and proper combustion control.
- 100% end‑of‑line tested for delivery, timing, peak pressure, and leakage to ensure install‑ready reliability.
- Pre‑installed O‑rings, cushion ring, and nozzle gasket to shorten install time and reduce leak risk.
- Direct fit for Ford 7.3L Power Stroke (1999–2003, engines built after 12/07/1998) to ensure correct fit and spray pattern.
- Supports Ford TSB remedy with AP63804AE long‑lead #8 injector to address cylinder “cackle” on applicable engines.
- Backed by a 2‑year, unlimited‑mileage parts warranty to lower risk over the service life.
Product Specifications
| Brand: | Alliant Power |
|---|---|
| Part Number: | AP63803AD |
| Product Type: | Injector |
| Injector Type: | HEUI, prime split‑shot |
| Category: | Engine & Drivetrain |
| Sub-Category: | Injectors |
| Condition: | New |
| Warranty: | 2 years, unlimited mileage (parts) |
| Engine Compatibility: | Ford 7.3L Power Stroke (1999–2003; engines built after 12/07/1998) |
| Vehicle Coverage: | F‑250/F‑350 Super Duty, E‑350, Excursion (1999–2003) incl. E‑350 Club Wagon/Econoline variants where equipped |
| Build Date Requirement: | After 12/07/1998 |
|---|---|
| Included Components: | 3 body O‑rings, 1 cushion ring, 1 nozzle tip chamber gasket (all pre‑installed) |
| Testing: | 100% end‑of‑line: fuel delivery, injection timing, peak injection pressure, assembly leakage |
| Installation Specs: | Fuel pressure 60–70 psi; IDM 120 V; low‑pressure oil ≥30 psi |
| Ford Service Bulletin Note: | Use AP63804AE long‑lead injector in cylinder #8 per TSBs 00‑10‑1 and 01‑14‑6 |
| Shipping Weight: | 3.10 (lbs) |
| Shipping Height: | 3.25 (in) |
| Shipping Width: | 4.25 (in) |
| Shipping Length: | 0.00 (in) |
| Name | Interchange |
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