So I'm having a spark blow out issue and if I put in new plugs (and im sure if I just clean the old ones too) it will boost and not skip a beat but after an hr or less of driving it will break up under boost again and smoke like a diesel. When I had my intake and head off I noticed my intake runners were practically coated in oil (mainly cyl 1&2 which are closest to the pcv hookup) and the source was the holes in the intake from the pcv line from the oil vapors getting sucked in. My car burns about a qt of oil in like 500 miles (a week for me) so the crankcase is under vacuum 90%+ of the time so it's able to suck alot of oil out especially at 3500rpm for 40 minutes (plus loose built motor) so I'm thinking the oil is getting on the plugs and making them blowout easy. So here's what I did...

I currently have the stock pcv setup in the back of the VC and the nipple on the d/s is bare and just open to the atmosphere. Stuck my vacuum gauge into that side nipple and got a SLIGHT vacuum (but feels like pressure w/ my finger so confused bout that). Then I disconnected the vacuum line to the pcv and plugged it with my finger and took out the pcv valve and then plugged that VC fitting with my fitting and it started building psi on the gauge as expected then after a few seconds smoke started coming from the turbo. If I unplug both VC fittings (and no vacuum) it smoked a little but not as much as when both fittings plugged.

What I wanted to see was if there would be better oil vapor "venting" with both VC fittings free to the air Vs. with a vacuum on the crankcase via the back fitting. and it's better with the vacuum hooked up to it (figured that). But thats with the stock VC fittings so I'm sure if I enlarged the VC holes it would vent much better since it can vent the pressure faster. I plan on enlarging the holes and running to my Saikou catch cans(not installed yet) and back to the intake (or a filter to vent) and run the side fitting back to the turbo inlet once I'm confident enough the catch can will catch any oil that might be sucked out from the turbo suction. but first I am curious why there is smoke when pressure builds in the crankcase...

So basically with no vacuum it builds positive crankcase pressure, with vacuum it does not and might even have a slight vacuum on the crankcase still. Is that pressure preventing oil from draining from the turbo and the oil is backing up into the turbo and making it smoke? or something else? I did not notice exactly where it was coming from but it looked like from the hotside but didn't want to do it for too long. Any comments/suggestions welcome

These are pics from when I had my intake and head off for a different issue. Notice all the oil in the intake and head coming from the pcv passageway...