Mine smokes a bit on cold startup, fully deleted with DUDMD tune. I assumed it was normal lol. It's a white-ish cloud, and it goes away very quickly as (what I assume to be) startup enrichment peters out. This is my first diesel, should it not be doing this? Mostly happens when it's cold out, but doesnt really happen on warm starts.

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'10 X5 35d- 279k mi, deleted and DUDMD stage 2, daily and tow vehicle
'01 330i- Drift car: SLR Super angle, BC coils- keep it simple
'07 335i 6mt - Sold @ 171k miles- stage 2 daily commuter for 2 years