Volvo V70 D5 - shaking when engine is cold

[passenger]

Hi guys.

Some strange thing is happening. Before I get EGR valve cleaned, I felt vibration while driving just 5-6km when engine is cold. Once engine warmed a lil bit, vibration was gone. It's not mechanical vibration from axle or bad wheels, it's very small engine cuts off, I would say.

EGR out - clean - vibrations (cuts) are gone for 2-3 weeks. Now, maybe is not related to EGR cause on vacation was lile 40 degrees every day and maybe that moved problem away a lil bit, as a said, cuts are only when engine cold is.

Back to home, a lil cold is here, like in mornings 16-17: cuts are here - engine is warmed - cuts are gore

What possible could be cause of those small cuts?

All 5 injectors are checked: all are good.
160kkm, all services until 130kkm in Volvo from day one.

Thanks