Audi sq7 problem

[Elmir sq7]

Hello, I'm calling from Sarajevo Bosnia... I have a problem with my 2016 Audi SQ7. On cold start, the Audi starts shaking a lot, the RPMs jump up and down and after 1 minute it stops. I fixed the DPF, EGR, intake valves... the injectors are all working as they should. When I removed the DPF, on cold start, there's a lot of white smoke coming out of the vehicle while there's that shaking, and when it stops, a little white smoke comes out. Has anyone had a similar case?

[Steve Q]

Are there any fault codes? 

Also could it be an issue with the maf sensor? 

[Elmir sq7]

no, it throws absolutely no error