To prime a NEW engine if not run....do not install glow plugs spin over 20 secomds or so wait couple minutes...you can use the spinning to prime injectors...fuel at unconnected lines....
Do this a few times with good charged batteries...if you have a real oil pressure guage you should see pressure eventually.
Install gp tighten down injections lines....should start pretty darn quick.
JM7.3CW