2010 Audi A5 Quattro premium 2.0T question
 

Hello I am new here, I have a 2010 Audi A5 Quattro premium 2.0T 95K automatic

Issues: started having misfires Cylinder 2 then multiple miss fires on other cylinders. I only noticed this when I was in park and car was idling. I tried removing oil cap there was a lot of suction I believe that is a good thing. Not sure. Vehicle is burning oil there are no leaks

cylinder 2 spark plug was broken and cylinder 4 had a little oil.

So I changed out all coils and sparks but still seeing miss fires on cylinder 2 and sometimes cylinder 3.

I do see slight bubbling in the coolant reservoir but not much.

i did get a check engine light but cleared it and it has not come back on.

codes:
P227900 - intake air system leak
P030200 - Cyl 2 miss fire
P030000 - multiple cylinder misfire

car runs perfect I would have never noticed anything if it hadn’t stuttered in park while idling or if the check engine never came on

any recommendations or ideas? Was thinking of doing the PCV upgrade to white but was told I will need to do a software upgrade and change out the front crank seal.