T444E (7.3 Power Stroke)
7.3 L · V8 · turbocharged · diesel · 1994–present
Also known as: t444e, 7.3 power stroke, power stroke, powerstroke, 444 cid, international t444e
Navistar International built it, not Ford — the T444E, sold in Ford trucks as the 7.3 Power Stroke.
⚑ That is the whole reason to know its real name. Ford badged and sold it; International designed, built and serviced it, and the T444E designation finds the engineering, the rebuild specifications and a parts supply the Ford name does not. The same engine went into International's own medium trucks and school buses.
Its reputation is exceptional and largely deserved: an indirect-injection design with hydraulically actuated electronic injectors, understressed at its factory output, and routinely running very high mileages.
The injectors are the characteristic fault and they are oil-driven — so a hard start, a miss or a no-start on one of these is an engine-oil problem before it is a fuel problem. Oil viscosity, level and the high-pressure oil pump come before the fuel system in any diagnosis.
The 6.0 Power Stroke that replaced it is a different engine with a far worse reputation, and conflating the two is the commonest error in Ford diesel discussion. The 6.9 IDI before it is different again — mechanical, no electronics at all — and both sit in the same trucks a few years apart.
Cars fitted with this engine
1 generation, across 1 make. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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