Both of those engine codes could cause those issues. Valvetronic kicks in around 2800rpms if I remember right. Could always be the vanos solenoids too. Doubt it's the trans at least I hope not for your sake. If it is just plan on doing a 6spd swap. My 3.0si hesitated until I PCV so it could be that as well. Depending on if yours is the gray or black top valve cover will decide if you have the CCV or the built in PCV.
Do you get rpm bounce at start up?
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