For the 2003 MY, the 7.3L Power Stroke was offered alongside the new, smaller 6.0L Power Stroke. The 7.3L Power Stroke has earned praise as one of the most popular engines offered in a pickup truck, its name synonymous with reliability and longevity.Ī greater demand for fuel economy and significantly lower emissions ultimately led to the retirement of the 7.3L during the 2003 model year. As demand soared following Ford's introduction of the Super Duty platform, the 2 millionth 7.3L Power Stroke equipped F-Series rolled off the assembly line in 2002. By 1999, 1 million Power Stroke equipped trucks had been delivered to dealerships. The popularity of Ford's International powered F-Series pickups is distinguishable in its production numbers, which greatly exceeded that of any competing manufacturer's diesel sales. In comparison to the prior mechanical injection system, the transition to HEUI promised improved performance, lower emissions, and better fuel economy stemming from increased fuel atomization and greater control over injection events.
In lieu of an injection pump, the 7.3L Power Stroke utilizes a high pressure oil pump (HPOP) and a low pressure lift pump in order to create fuel pressures up to 21,000 psi. The 7.3L Power Stroke turbodiesel is characterized by its HEUI (hydraulic electric unit injector) injection system, which uses highly pressurized engine oil as a medium for creating fuel pressure directly in the injector body, as a opposed to a system requiring a typical injector pump.
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