I have posted earlier about my white smoke issue...I have came to about 1 conclusion. Timing...My gut feeling is the timing advance on the front of the injection pump is acting funny. I have a few spare pumps laying around and was looking at timing device. It wouldn’t take much to just weld it solid and set the timing. Why do you need that advancement device? Most mechanical pumps don’t have them anyhow. Were they for emission reasons? Thoughts?