[Richard and Rhonda]

It's not the turbo. I pulled the intake elbow and it spins freely. No play, and no signs of damage.

I also barred the engine a number of revolutions with no tight places. I checked my timing marks while I was at it. No problem

A fellow on a diesel site suggested that I may have an injector problem.

I'll pop the hatch, and use a temp gun to scan the exhaust manifold. I am thinking if I have an injector problem then that cylinder should be colder than the rest.

If I had the DD interface on a computer, I think you can shut one cylinder down at a time. That would be the trick. Try them until the smoke goes away and you have the culprit, that is if injector problems are the source.

Perhaps one of the connections came loose or a wire got pinched.

I am still trying to figure out a root cause that would explain why it did not do this when I first cranked it.