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This may seem like a silly question but here goes. I have a basic understanding of how the fuel injectors in a 6.0 PSD work. To state it simply(according to my knowledge): The injectors use oil pressure to pressurize and inject the fuel. So how does the engine start? It is the first injection of the fuel that starts the first combustion event that turns the engine thus building the oil pressure. But how can you inject fuel if you don't already have oil pressure? :confused: And it takes a second or two for my oil pressure to come up when I start it. It's kind of the which came first the chicken or the egg scenario. Unless maybe you don't need hi-pressure fuel to start the engine?
Any insight or enlightenment would be appreciated! I'm just interested in how it works! :bump::bump:
 

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Both oil pumps (LPOP and HPOP) are mechanical, so as soon as your starter turns the engine over, you begin to build pressure.
 
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