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Hi Jeremy, I've been thinking about this a couple days and see one possible reason for such to happen. The Ford 7.3 and 6.0 diesels, both use a fuel pump to pressure fuel to the injectors via a fuel rail inside the head, at about 65psi. When you shut the key off you have a residual fuel pressure of less than 65psi but greater than 0psi until the pressureized fuel returns to the fuel tank via the return fuel line. During that time delay of before the fuel is returned to the tank thus dropping to 0 pressure, the injectors could leak enough fuel to run the engine for a short time. Any diesel engine could do this with leaking injectors. The injectors are probably leaking a very small amount of fuel and would be why the engine would stop when the key is turned off. As the engine sets, then enough fuel would leak into the cylinder to fire the engine for a short time. Had the e-brake been set or the transmission been in neutral, then you could have not rolled the engine over enough for the engine to fire on it's own compression charge of fuel and oxygen. T_Bone
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