timing pump with drip spout. Help!

I am trying to time a injection pump and srart of delivery on a 1981 300D. I insalled the pump with the marks lined up on the pump. I have the engine timed to 24 BTDC as the manuel said. Installed pump, loosely tighten nuts. Bled system of air, by the manuel. Removed spring and plunger out of first injector line fitting and re-installed housing. Installed drip spout and pumped up system with manuel pump. Fuel starts out as a stream and slowly turns into drips and gets to one drop per second and keeps getting slower until it stops. I have swiveled pump through all its movement on retard to advance. I have no leaks and now i am at alost. Also i have the pump in full throttle, tied linkage with wire, and i have no injector lines connected, and the line to the fuel kill is disconnected too. I need some help please.