[Biturbos4] Shaky start

[Quincy Chiang]

Hi all,

I haven't driven the S4 for over a week, when I started her up today, the engine was shaking pretty badly for a while, it eventually smoothed out after a minute, when the idle speed dropped down to normal from 1200rpm.  I'm guessing there's residual fuel inside the cylinders causing the engine to run very rich for the first little while, or is it something else?  Anyone had this happened before, should I be concerned?  Thanks!

Quincy