D24 Won't Start after Replacing Injection Pump

[DieselScout]

I attached a Mity-Vac to the "out" return line of the injection pump and pumped about 2 gallons. Bubbles were present the entire time and are still present.

How long should this process take?
Does this indicate an air leak somewhere upstream of the pump?

[ngoma]

Originally Posted by ngoma

Crankshaft rotates 2x for each camshaft revolution, IP is connected 1:1 to camshaft so it is possible to time IP 180deg out relative to camshaft.

As RedArrow shared above, verify crankshaft at TDC, with camshaft #1 lobes pointing up & out, notch on IP cog pulley should roughly align w/ mark on IP triangular mounting flange.

I just thought of another possibility-- you said the IP was rebuilt? It is very easy to reassemble the IP internals 180deg out so if the rebuilder wasn't paying close attention to the distributor plate pin and slot orientation to the main shaft key (can be easily fit together either way) then the IP can be 180deg out even when the external marks are all lined up...

But first let's get the system purged of air and pumping fuel out the injector hardlines.