7.3 Powerstroke

The 7.3 Powerstroke was used by Ford during the late 1980s and early 1990s. It was used for roughly six model years and although many refer to it as a 7.3 powerstroke it is not really part of the powerstroke line. The first 7.3 powerstroke engine did not have turbo charge and had an indirect injection engine. Later, the 7.3 powerstroke was offered with a turbo charged option. Ford made the 7.3 powerstroke similar to the 6.9l but made room for more torque.

7.3 Powerstroke Engine Specs

The 7.3 powerstroke engine has a fuel injection system with hydraulic electronic unit injectors. The valve train is an OHV 2-V and it also has a single standard turbo configuration.

7.3 Powerstroke History

The 7.3 powerstroke was changed significantly during 1994 and moved from the IDI engine to a direct injection engine. This is when the 7.3 powerstroke took on the title “powerstroke” partially due to the addition of electronic fuel injectors. As a result, the 1994 7.3 powerstroke offered drivers 525 pounds per feet of torque and up to 250 horsepower. The 1994 7.3 powerstroke engine had what was called “single shot” fuel injectors and they worked with a high pressure oil pump to increase pressure for the fuel injection.  

Other Changes to 7.3 Powerstroke

The 7.3 powerstroke received improvements every year. For example, the air to air intercooler was an addition for the 1999 model year. This intercooler made the turbo’s charged air more dense by cooling it. Once the air had cooled down and become more dense it was able to reduce the temperatures of the exhaust gas and at the same time increase the engine’s horsepower. Additional changes included the addition of a wastegate and the change to .84 A/R housing.

7.3 Powerstroke Upgrades

The 7.3 powerstroke engine received quite a few upgrades. One of them was “split shot” injectors in place of the “single shot” injectors. Also, the HPOP had to be improved in order to support higher fuel pressure. The 7.3 powerstroke was produced until the 2003 model year and then it was replaced. The replacement was the 6.0L powerstroke engine.  

7.3 Powerstroke Conclusion

It is important to understand that the 7.3 IDI is not the same engine as the 7.3 powerstroke engine. The only similarity is that they were both Ford engines. The 7.3 powerstroke was the powerstroke engine that lasted the longest and that was considered to be the most reliable.