You need to prime it, the primer pump is on the side of the injection pump. If it is the old style (white platic top?) you have to unscrew it before you pump it, the new style (black cap)you just pump. There should be a lot of info if you use the search.

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k