first video. This was after removing the PCV and capping off the intake mani barb and the VC barb. tons of smoke

http://s382.photobucket.com/albums/oo269/eclipse8129/?action=view¤t=2011-11-06_17-12-50_492.mp4

second video. This was after re-installing the PCV. smoke gone.

http://s382.photobucket.com/albums/oo269/eclipse8129/?action=view¤t=2011-11-06_18-59-10_540.mp4

thoughts on what would cause this????

That's a pretty severe difference, but otherwise I'd just guess it's doing what it's supposed to. Puts a vacuum on the crankcase to relieve some pressure that otherwise can blow oil and such past the rings. being that severe, I'd guess worn rings (not horrible, but noticeable in this case). Not sure what would case abnormally high crankcase pressures to add to it. I've had mine d/c for years, and only notice smoking at idle if it's been idling for more than ten minutes or so.

Thanks for your insight justin. I knew it was pretty severe but didn't think that was normal.

I would be perfectly fine with the PCV connected and will run it inline with a catch can, but one thing stops me - high idle. With it disconnected, I idle normal, but connected and my idle sits around 1.6K. Quite annoying. Also, it's not a legit PCV for the car, it's just a one-way check valve because my crankcase was seeing positive pressures under boost.

If I could restrict the amount of air the check valve pulls, I think I could lower the idle RPM. Hopefully the length of hoses going to/from the catch can that I will soon install, will restrict airflow just enough to bring it down.

nobody else?

Have you thought of running both a PCV and the check valve?

i've done alot of reading up on this

first let me say that what you see in the video is not actually a PCV valve, it's just a generic one way check valve. With that said, lemme elaborate on my findings.

1. with both sides capped off (IM and VC), it smokes alot and idles normally
2. with generic one way check valve, it doesnt smoke AT ALL, idles higher than normal (1.6k), and the side VC nipple has ALOT of vacuum coming from it - almost like an open hose
3. with PCV installed, it smokes as bad as if both IM and VC were capped, and idles fine. Side VC nipple has no vacuum.

based on what i've read and what I stated above, I'm leaning towards worn valve guides and/or seals. I say this because over a long period of time, I was unaware that my crankcase evac system was pressurizing my top end (which should have been the opposite). I believe over time, the seals took their abuse but finally have given way.

I also think the reason why there's no smoke at idle or driving with the generic one way check valve is because the diameter/orifice of the valve is large enough to create additional vacuum to help "draw back" the oil that normally would've fallen into the combustion chamber with a normal PCV valve.

I'll be running some tests to narrow down the culprit, but as of now those are my findings. I have a few things i'm going to try, one of which is to remove the turbo to rule out oil bearing leak possibilities.

to answer your question eric, i've read running both (PCV and check valve) is a no-no, but i don't have the link from AGP that says so - it's on my home computer.

Anyone else?? :D

you have a couple options still:
1) Cap the IM port, run breathers on the VC ports
2) Cap IM port still, but run VC to catch can, then plumb pre-turbo pipe for vacuum. This is how a lot of OEM boosted engines run, you just need to be careful of your sizing and placement of the pre-turbo port so you don't suck too much air.

I ran (2) for the longest time, but d/c it one winter when my cone filter froze up after a heavy snow. It sucked 4qts of oil from the crank case while getting air from the only place it could!

When I did a re-ring, found that a std PCV valve was sucking a ton of oil, IM was dirty as heck on the inside with like 1/16" of sludge on all surfaces. Plugged the IM port after that!

Hope this helps

thanks man, i'll def try that. i'll be out of town till mid next week, but will try things out and revive this thread w/ my findings

so, not to revive this thread, but for future searchers I found the smoking issue a few weeks ago - just bad turbo oil seals

read here -> http://forums.2gnt.com/dcboard.php?az=show_topic&forum=8&topic_id=109098&mode=full