Update..... So, I took the hv pump off the engine I'm replacing , cleaned and inspected it , then put it on the new engine. Same drill motor, same oil,and the pressure is now is just over 60 psi.
Thanks for your input, I appreciate it.
Changing the pump in the car will be a PITA .I would have to lift the engine to remove it . Would be nice to resolve this issue with the engine out of the car.
Yeah that doesn't surprise me. Sounds like you're leaking some oil inside the engine so you need the HV pump in order to build pressure. It could be the EDM lifters or it could be the lifter bores or it could be something else. You can find it if you take the time to look for it or just run the engine with the HV pump and see how it works.
