Easy Newbie Questions
10-09-2004, 12:21 PM
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Easy Newbie Questions
Het guys I'm curious on a couple of things. Can someone tell me what EDM stands for, and how do Ford's HEUI (I think thats what they are called) fire, something about oil pressure? Thanks.....
10-11-2004, 06:02 PM
#3
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HEUI (Hydraulic Electronic Unit Injector) injectors are run off the high pressure oil pump, I think it runs somewhere around 200 PSI. The injectors are supplied with 40 psi of fuel pressure off a fuel rail. A solenoid on the injector controls the flow of the high pressure oil a piston in the injector. When the oil pressure pushes on the piston, it pressurizes the fuel in the injector and the injector fires just like an injector that is attached to a pump. It's just a different way of getting injection pressure to the injector.
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