Ok finally back on the 1550 project I started several months ago. Injector pump rebuilt and when I reinstalled huge white smoke and heavy diesel smell. Could not seem to get the pump timed correctly-or so I thought. Finally loaded it up and took the whole thing to the injector shop. What a great guy. Came out and messed with it for sometime. He agreed that either timing or sucking air somewhere was the problem. When advanced as far as we could turn it, it was better but not good enough. I will run it on diesel out of a can tomorrow to see if it runs better and to eliminate an air leak as the issue. If timing is still the problem I'm going to take off the pump and elongate the mounting holes to get a couple more degrees of advance. He seems to think one or the other (maybe both) will do the trick. We will see. I have no visible diesel leaks but it would be sucking and not under pressure.