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: It uses HEUI (Hydraulically Actuated Electronically Controlled Unit Injection), which relies on high-pressure engine oil to fire the fuel injectors.

While reliable, specific components are known to fail over time: leading to misfires.

: Features a robust cast-iron block and cylinder heads, designed for high-stress towing and longevity. Key Technical Specifications Engine Configuration 90° V8, 16-valve Displacement 444 cubic inches (7.3 liters) Valvetrain Overhead valve (OHV), pushrod-actuated Turbocharging Single Garrett turbocharger (Intercooled after 1999) Fuel System HEUI direct injection Common Issues and Maintenance leading to misfires.

: Because it uses oil to actuate injectors, maintaining fresh oil with the correct viscosity is critical for performance and fuel economy. Buyer's Recommendations leading to misfires.

Experts typically consider the as the peak for this engine, as they benefited from factory intercooling and electrical lift pumps. Late-model engines (2001–2003) occasionally used PMRs (Powdered Metal Rods) , which are considered slightly less desirable for high-horsepower performance modifications than the earlier forged steel rods. 1994-1997 Ford 7.3L Powerstroke Buyer's Guide - XDP

: Can come loose or burn out, leading to misfires.