I'm a tech and I have a 2004 6.0 no start 120k no codes
I traced it down to the lpop. I pull the cover off the lpop no oil is being pulled through picktube. no oil in pump. I found the regulator stuck open . this would cause it to not pull oil at all right? or would it still pull some oil ? gears look ok! minimal scarring. Also I pulled the regulator but only spring came out (spring shot out) orifice is still stuck in front cover afraid of scarring it up with a pick any ideas on safely removing said stuck regulator?
Have replaced regulators on the 6.0. Sometimes just a bad one. Other times debris will cause it. Will need to see if something went through the pump. Usually if something did it turns out to be a needle bearing out of a lifter that's coming apart.