An Update. I changed out the stop solenoid today. I think the old was was working after I pulled it, but replaced it all the same. I then bled the system again starting at the filter. I pulled the valve cover and it appears at least on visual inspection that the timing is OK. I pulled the glow plugs and only one is working so I will replace. As I cranked the motor over it seems the injector for cylinder 3 and 4 are getting fuel injected to them but 1 and 2 are not. The pipe at 3 seemed to have a higher pressure than 4, and I never say fuel squirting at 1 and 2 at all. So my conclusion is that the problem lies with the injection pump. I let the motor turn over for probably a minute but never saw fuel at 1 and 2. Does my assumption seem correct? If so I will order a pump, but I want to make sure I am not missing something before a spend the money. Thanks again for the advice.