I recently fitted a PCV and had the same issue. The forum advice was to unistall it and try again making sure that all the connections are secure.
TBH I didnt get round to it and havent noticed it again.
Out of curiosity where did you get the map done?..
Mines currently running a map that it came with and its not perfect but ok.
Im taking it to Sams Dyno in Fould soon and for �95 he's gonna do a custom map.