Here is one of the few cases where I would say to remove the mods and take it to the dealership. Since the problem started before you put in the MBC and BOV they are not the cause.... so take them off and go get it fixed.
Never try to fix a problem like this by throwing new parts on the car, find the cause of the problem FIRST... then do mods
Keith
Never try to fix a problem like this by throwing new parts on the car, find the cause of the problem FIRST... then do mods
Keith