pcv system ideas

[bluesubaru]

I have read the 4 pg thread on "How the PCV system works" and wanted to explore it more.
Okay I turboed my 95 Legacy 2.2L.
The stock NA intake system worked like this: the valve cover lines come to a T and go into intake. The Crankcase (big hose) goes into the intake by itself. The pcv goes into that F shape and back into the intake.
The order of the lines from the intake to the throttle is crank, pcv, valve covers. Would the order matter with the turbo setup?
Now I was messing around and while NA, I unplugged the big crankcase hose, the car turned off real quick. So I plugged it back in and unlugged the valve covers, the car ran fine.

Now that I am turboed, I have to reroute my PCV system to work. I had it to where everything pretty much T's together and goes into one hose back into the intake. The car ran and drove, but did not seem perfect all the time.
So today my EJ22T intake came in and I figured this would fix everything. I ran the valve covers to a T and then to the intake, and the crank and PCV to a T and back to the intake. The car would turn on, and rev fine, but once I try to drive it, it would die.
Now my thoughts are, one I have a bad leak (doubtful), or the crank should have its own line, and the valve covers theres, and the pcv its own. The pcv could be ran to a catch can then back into the intake.
It seems to easy, but what do you all think. Some of you with swaps, or input of what you have and what works would be great.

David

[vrg3]

Wait, I'm confused... Your NA block had two fittings on the crankcase?

Which fittings exactly do you mean when you talk about the "pcv," the "valve covers," and the "crank?"

[bluesubaru]

two fittings for the crank? no
what do you mean what fittings? I am unsure what you mean vrg3, its just that the valve covers each have a hose, where the pcv valve is, has its own hose, and the crankcase has its own big hose.

[vrg3]

The stock NA intake system worked like this: the valve cover lines come to a T and go into intake. The Crankcase (big hose) goes into the intake by itself. The pcv goes into that F shape and back into the intake.

That part confuses me.

I thought the NA system had one fitting on the top of the crankcase and one on the top of each valve cover. The valve cover lines tee together and go to the intake snorkel, and the crankcase line goes to both the PCV valve and the intake snorkel.

I was getting confused because they're all PCV lines. But I think I understand now.

Connecting the crankshaft and PCV valve to a tee isn't ncessarily going to work right because I do believe you need some kind of size differentials and stuff, as described in the other thread.

But I don't see why the engine would die under load. That puzzles me.

What do you mean by giving each fitting its own line?

[bluesubaru]

this is the way I have it now (left one). Notice how the pcv and crank come together and then go into the intake, and the valve cover hoses come together and go back into the intake.
The problem is, my car will idle and rev, but wont drive.

Before today I had my lines run like this. (right one)
thanks to (unsungboxer) for the pic.
the car ran fine, but idles good and bad sometimes.

http://pg.photos.yahoo.com/ph/tampadude ... /my_photos

[bluesubaru]

as in have three lines now instead of two. Making the crank and pcv valve have seperate lines instead of coming together and then going into the intake.
The size difference is there, the crank is a big hose, and the pcv valve is much smaller, if thats what you mean.

[vrg3]

Hmm, those links don't seem to work.

The line coming from the crankcase is the fitting all the crankcase gases come through. They need to end up either going through the PCV valve or into a low-pressure part of the intake, so it doesn't seem to make sense to separate them -- what would you do with them?

The turbo valve covers have two fittings each, and the turbo block has two fittings as well. The extra fittings (the ones closer to the front of the car) are supposed to be teed together. Have you done this?

[bluesubaru]

have I done what? what fittings?
and the links I tested, they work for me, odd.

[vrg3]

They might be working because you're logged in to Yahoo or something... you might want to try hosting them with THAWA's gallery.

http://www.graphics.cornell.edu/~v/vacuum/

Have you joined the front fittings, simulating parts 10, 11, 14, and 15 in my PCV diagram?

[bluesubaru]

the valve covers look similar to what I have. But then there are another set of hoses that go to the vc again. Which i do not have at all.
I have a EJ22 NA motor with a turbo setup. Not a EJ22T motor.

Do the hoses have to go back into the system all at once, or can they do something else. I know there isnt a clear anwser. But obviously some of us have done it.

Retry the links above again.

[vrg3]

Oh. Okay. So you only have one fitting on each valve cover.

It's unclear what you mean by "back into the system."

You connect hoses to the fittings on your valve covers. They need to join together (after equal lengths) and then connect to some part of the intake between the MAF sensor and the turbo compressor. This will allow fresh filtered metered air to enter the valve covers.

Then, you need to connect the fitting on your crankcase to some kind of thing that simulates the F-pipe. That thing will then connect to the PCV valve and to a venturi just upstream of the compressor.

If you can spare the cash, emulating the stock EJ22T system seems like the way to go. I'd recommend just taking the part numbers from my PCV diagram and ordering part 1 (the F-pipe), part 17 (the venturi), hose 3 (the hose to the PCV valve), and part 16 (Boot B), and using those. You should be able to use cheap 1/2" and 3/4" heater hose for the remaining hose.

[bluesubaru]

The vc do come together after equal lengths.
And well I do have that little boot peace, with the 3 outlets on it. My stock system comes with that F pipe. What would the venturi do?

It seems like the way I have it now is what it should be. I must be losing vacuum or air somewhere real bad. Hmmmm....

Where is the crankcase hose at? is that the #2?

[vrg3]

The venturi allows the partial vacuum in the intake piping to suck crankcase vapors when intake manifold vacuum is unsufficient.

If your current configuration is pretty much the same as how the stock one should be, I guess you must have a leak somewhere that's letting lots of unmetered air in or something.

The hose that fits directly onto the crankcase fitting is #4. It connects to the base of the F-pipe as well. #2 is what connects the F-pipe to the venturi.

[bluesubaru]

yeah mine looks pretty close. the only difference I see is this.
1,2,3,4 all look the same to mine.
But right next to where 3 goes into the intake manifold, I have a big .5in hose coming out (i was assuming this to be the crank) Thats the only difference I see here. To where and what that is.

[vrg3]

Are you by any chance referring to the IAC valve's 19mm hose?

The IAC valve needs to be connected somewhere between the MAF sensor and the compressor with 19mm or 3/4" hose. If you don't have that set up correctly, that would be a good explanation as to why your car won't drive.

[bluesubaru]

Is that the Idle Air control valve hose, might be, yeah it is pretty big, I had to reduce down to like a 1/4 or so hose to make it mate up right. That might be why. Ill give it a shot now.

[vrg3]

Yeah, look carefully to see where everything goes so that you know what you're actually doing. Good luck.

[bluesubaru]

if i can get pics for you, where can I host them so I can try to show you what I am working with.

[vrg3]

http://bbs.legacycentral.org/viewtopic.php?t=17062

[bluesubaru]

http://www.imagestation.com/album/?id=2130676222
Hope this helps.
Fresh new pics!

http://www.imagestation.com/picture/sra ... 1db5aa.jpg
http://www.imagestation.com/picture/sra ... 1db5a7.jpg
http://www.imagestation.com/picture/sra ... 1db5a3.jpg
http://www.imagestation.com/picture/sra ... 1db5a2.jpg

[vrg3]

Wow, that's a rat's nest.

What kind of turbo are you using? That looks kind of weird that Boot B is off at an angle like that... Is it connected securely to the compressor inlet?

So the line you have labeled "crank" is actually coming from the F-pipe, right? And the base of the F-pipe is actually connected to the crankcase?

Unless there's a leak somewhere I can't see why the car wouldn't at least drive.

Have you tried maybe resetting your ECU or something?

[bluesubaru]

a rats nest indeed. I see other setups like mine, but I don't see all their lines going everywhere, and its hard for me to trace them anywhere.
The line labeled crank is yes going to the f pipe, the base of it goes to the crank.
The turbo is a wrx tdo4.
Boot B?
If its easier to communicate, can you IM me?
the car as of how you see it starts, idles fine, and about 3mins later will start to die.

[vrg3]

I can't IM right now...

Boot B is the rubber elbow that all these things are going into.

How do you have Boot B connected to the compressor inlet?

So the car dies after about 3 minutes, even if you don't try to drive it or anything? I don't think the problem is in the PCV system.

Did you end up changing your fuel pump wiring last time?

[bluesubaru]

I put my hand all over trying to feel air leaking out.
Boot B goes to a bend and is then clamped onto the compressor. I put my hands all over that area and felt no air loss.
My fuel pump wiring was never changed.
I reset the ecu, the car idled about 700ish and read about 20.5 mHg (vacuum) on the boost guage, the dies about 3-4mins later on its own.
its weird that two nights ago the car ran almost perfect. The next day this happens, weird.

[vrg3]

You wouldn't feel air leaking out; it would be air leaking in. Try the starting fluid test. If that term is unfamiliar, do a little searching for the terms "starting fluid" with me as the author.

How did you resolve the short circuit problem you had before?