Originally Posted by coryhussey
well i pulled the pump apart and see nothing unusual. I did notice from looking at a few exploded views of gm saginaw pumps, that my pump is missing a few parts that I noticed on some of the pictures. In the picture I am missing #5 and #6 out of the back of my pump. Just #23 and #24 are there. Not sure if that has anything to do with my problem
Those parts, 5 & 6, are the relief valve assembly. Without those you will build zero pressure, hence your problem. Return the pump for a replacement.