Sounds like oil issues to me, does the smoke smell of raw fuel?
Like stated check balance rates cold, warm, in park, in drive, also find out what your rail pressure is found maybe its falling on its face.
Next thing to do is pull the I take horn (really a pita!!) and check the turbo for shaft play. You can also pull off the hose that comes off of the turbo to the intercooler and check for oil there, that's another sign.
Good luck and keep everyone posted on results so we can further help you