Hi, Unibody Madness is telling you he thinks the pump lost it's prime and I think so too. It may be very dry. You may have a broken pickup or a clogged screen. I would remove the oil pressure sender and spin the pump with your drill, I believe clockwise, but I am not sure, and see if you get oil at the sender. If you do get decent oil at the sender, it is not the prime. If there is no oil at all, I think you may be able to back prime the pump squirting or pouring a lot of oil down the hex shaft hole (if you're lucky) , or figure out how you can fill the oil passages through the sender opening I have 3 ideas for that. 1 squirt can, 2 gravity, 3 somehow pressurize it. I would screw in regular pipe fittings and pipe adapters until it is big enough and high enough to hold a small funnel, and slowly add some oil. That should prime you pump pretty easily. Good luck