Help me stop smoking

[B-Man]

I'm currently fighting two issues, and I can't tell if one's causing the other, or if they just happen to happen at the same time. I have a feeling I know what one of them is, but I wanted to see what others thought before I go spending more money hunting down the issue.

First issue: Since the weather has gotten warmer, my car seems to blow a huge solid cloud of smoke in boost beginning 4.5-5k rpm, doesn't seem to matter if I'm running 12 or 17psi. At first I thought I was just running extremely rich but my wbo2 reads 11.5-11.8. I do have a crack along the front manifold and my wideband is located just in front of where the stock main cat would be. I thought it was possible that the wideband could be reading a little lean so I pulled more fuel until about 12.5 and was starting to get knock but still blowing smoke. I returned it back. I plan on checking for other exhaust leaks this week, but I don't believe the wideband is reading far enough off that I should be blowing that big of a cloud of smoke so I'm beginning to consider this is oil smoke.

Second issue: When the cloud happens I sometimes get a stutter, like spark blowout. I believe this has to do with my voltage dropping at around the same rpm (from 13.9 at cruise to 12.7 range). I tried a new alternator and it helped for a short period, but still is hit or miss.

Here's info I think will help. I checked the intake tube before the throttle body and it's clean (no oil). The plugs aren't caked in oil, so I don't think it's ring blowby. PCV valve only a couple months old. I changed the spark plugs and this is what I found:

[green-lantern]

I might be able to help. I'll post tomorrow, bedtime now

[keo92stealth]

are those plugs showing signs of lean?? or am i just seeing things.? lol

[niterydr]

Drop the exhaust and look for oil in it to see if the turbo seals are shot.

[B-Man]

Thanks Josh, I'm gonna try and do that tomorrow, if not, hopefully this weekend.

[Alan92RTTT]

IIRC VSS should only cause oil burn off boost then the engine is sucking air. It should not happen under boost.

My bet is turbo seals. Check the IC pipes for oil as well. A small(aka tiny) bit IIRC is normal.

[B-Man]

IIRC VSS should only cause oil burn off boost then the engine is sucking air. It should not happen under boost.

My bet is turbo seals. Check the IC pipes for oil as well. A small(aka tiny) bit IIRC is normal.

I check the IC piping right before TB and no oil.

My thought it turbo seals also, but I was hoping for more response to the thread and didn't want to sway anyone's thoughts.

[green-lantern]

Try pulling the hose off between the heads. Some of these cars just seem to have issues with pressure building up in the crank case and pushing oil out of the exhaust side turbo seal. I had no oil in the IC pipes and very little in the hose to bubble. Are you running crank vents? If you are, are they the small ones?

I've always seemed to have this issue (other than the blow out) and I had to vent my crank case to solve it. BTW what is you plug gap? Also you might have got a bad PCV valve. Where did you get it?

[B-Man]

I guess I can try that, seems like a long shot though, at least it's easy.

Stock PCV from local mitsu dealer.

[Sin'sVr4]

I do the same on hard pulls. after i let off the gas i get a nice puff of smoke, but only on hard pulls. nothing during regular driving. Absolutely no oil in the IC pipes, DP, or turbos. i need to better vent my car and i am using both DR krank vents and stock pcv. think i need to drill out the pcv