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Ford Diesel Injectors
The Ford Powerstroke injectors use a design engineered by Caterpillar. The system is called HEUI. This stands for hydraulic electric unit injector. Diesel injectors are actuated with hydraulic oil pressure created by high-pressure oil pump using engine motor oil. The diesel injectors are controlled electronically with a solenoid located on the injector and controlled by the engine computer. Caterpillar 3126, C7, and C9 engines have all used this system. The HEUI system was also used on International’s medium duty engines from 1994 through 2010. The Ford Powerstroke injectors are the same as the ones in the International truck engines. International manufactured the Ford Powerstroke engine for many years.
Ford has used two engines with this system: the 7.3 and 6.0 diesel. The 7.3 Powerstroke injectors were used from 1995 to 2003 and the 6.0 Powerstroke injectors were used from 2003 until 2008 on the F Series trucks. The E Series van used the 6.0 Powerstroke injectors through 2010. In 2008 Ford went to the 6.4 engines using a high-pressure common rail injection system designed by Bosch.
The Ford Powerstroke injectors and engines have been very popular and were produced in very high numbers. The engine has performed very well with only a few problems. A lot of the problems that occur are because of poor, or lack of, proper maintenance. The biggest problems occur because of not changing the oil, or using the incorrect oil. Remember HEUI. The fuel injector uses engine motor oil to actuate the fuel injectors. When dirty oil is running through the fuel injectors it causes problems that shorten the like cycle of the diesel injectors.