Cummins 870 oil pressure

[Jstephens129]

Not sure , bought the truck from someone who decided putting a used engine in it without doing any kind of rebuild while it was out of the truck , the old engine threw a rod so they put a low mile engine in from a local in town , I was told it had 600k miles on it but haven’t hooked up to old ecm to verify , old engine had 900k before it blew .. I’ve been just trying to fix previous owners screw ups and it’s been a job .. I’m ready to throw in the towel if this oil pump and tube doesn’t fix it .. sick of messing with it and like I said previously no one around us is that familiar with Cummins, I’ve reached out to haggai but they are so busy they keep scheduling a month out and sound like they don’t really want to mess with it so I’m just trying to do all I can myself