I have same problem, but it followed an issue of blowing smoke all the time when starting, real bad. So I went and checked all the usual items, CCV, hoses, separator, and replaced them all, CCV was OK, no sludge or torn diaphram, but replaced it anyhow given it was such a huge pain to get off with manifold in place, so looking at separator, it too was clean, but replaced it anyhow for same reason, but what I did see were the two hoses going to separator were sucked in by vacuum, pinched, and when I pulled them off, they had sludge patially blocking hose, so I replaced both of these hoses as well. OK, to top it off, I replaced the bottom separator hose and even the small drain hose going back to crankcase.
Major smoke issue was gone, thank God, but I am now seeing smaller degree of smoke come out of both tailpipes after about 4 or five low RPM driving when car is fully warmed up. This has been repeated several times so it is as if something is electronic, as in sensor of some kind? If I shut car off for a few minutes, then no more smoke? Drive it again for a 3 or 4 miles and it starts to smoke again. This has me stumped, any ideas.