problems with vacuum routing under the plenum.
 

Hi folks, I took off my intake plenum about 6 months ago, and am finally getting round to replacing everything underneath it (hoses, knock sensors). I'm having a bit of trouble with my final vacuum hoses though, I've done a search, and that has help with the others, but these are unclear.
http://www.subaru-svx.net/photos/fil...e7en/41960.jpg

its that damned black box, all my hoses snaped like glass when I took of the plenum, so I have no idea how it is supposed to be routed; it has two nipples, I don't know where those go, and I have one metal line the terminates close to the box, and a metal nipple that runs out of the plenum directly beneath the box.

Anyone have a diagram I could consult or some advice?


Thanks.

Patrick

Patrick,
the big black box is part of the IRIS system. There should be a short piece of tubing coming out of it that connects to a check valve (which is about the size of your thumbnail) which is then connected to another piece of tubing that connects to the vacuum fitting on the intake manifold right above it.
-Bill

SVXride, thanks for the tips, there are two outlets on the black box, I understand that one of the outlets is connected to a check valve. and then into the intake plenum at the nipple just below the black box, does the other connect to the metal tube that is connected to the gas lines? (on the left side of the picture, shown in my illustration in red)


I've got half of the puzzle figured out now, thanks for that.


Patrick.

The other opening is connected by a piece of tubing to the diaphram can on the IRIS valve. From the looks of the picture, you've got the tubing from the diaphram can hooked up wrong.
-Bill

This is what I'm using as a reference.


<img src=>http://www.subaru-svx.net/photos/files/SVXRide/30472.jpg</imgoideast, any p righked u

from the looks of this, I've got it hooked up right, any ideas?


Patrick

Patrick,
I goofed. Yep, the other opening connects to the hard line that goes over to the other valve, which is then connected to the IRIS diaphram via a piece of tubing. You've got it right!
-Bill

Re: problems with vacuum routing under the plenum.
 

this is prob an old thread, but does anyone have a better pic
or view of where the vacuum lines go on that are under the plenum
on the pass side front the front tubes to the rear ?

Re: problems with vacuum routing under the plenum.
 

If you can't find it here, it probly ain't there...

http://i176.photobucket.com/albums/w...d_riser_on.jpg http://i176.photobucket.com/albums/w...isty_thing.jpg http://i176.photobucket.com/albums/w...er_removed.jpg http://i176.photobucket.com/albums/w...eference_1.jpg
http://i176.photobucket.com/albums/w...eference_2.jpg http://i176.photobucket.com/albums/w...eference_3.jpg http://i176.photobucket.com/albums/w...vator_hose.jpg http://i176.photobucket.com/albums/w..._is_filthy.jpg
http://i176.photobucket.com/albums/w...09_VC_tank.jpg http://i176.photobucket.com/albums/w...id_14770AA.jpg

Cap of 10 pictures per post... more below!

Re: problems with vacuum routing under the plenum.
 

...the rest:

http://i176.photobucket.com/albums/w...h_11_Dunno.jpg http://i176.photobucket.com/albums/w...2_PCV_hose.jpg http://i176.photobucket.com/albums/w...14770AA270.jpg http://i176.photobucket.com/albums/w...rail_bolts.jpg
http://i176.photobucket.com/albums/w...Connectors.jpg http://i176.photobucket.com/albums/w...o_TB_hoses.jpg http://i176.photobucket.com/albums/w...h_17_Final.jpg

Re: problems with vacuum routing under the plenum.
 

that helps, thanks