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Old 08-20-2009, 12:31 PM   #1
litowrx
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Default Purge Control solenoid valve hooked up correctly?

Hey guys, i notice a few months ago, that i had a couple of hoses unhooked around the PCSV (purge control solenoid valve)

I found a diagram, and i decided to hook them up the way the diagram tells...

Just want to make sure this is correct... these have been unhooked, god knows how long... i havent had any problem but i guess its better this way...

This is the diagram i found:




So i go ahead and zip tied that blue coupler , because everytime i move something it pops put...

Are the circled hoses suppose to be hooked up?




This is what it looks like finished... is this the correct way?




Thanks!
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Old 08-20-2009, 02:06 PM   #2
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Anyone?
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Old 08-21-2009, 01:44 PM   #3
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Help please...
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Old 08-21-2009, 02:39 PM   #4
the suicidal eggroll
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http://www.thesuicidaleggroll.com/sti/7-18-09/

pics of the purge system are at
0557
0570
0571
0572

hope they help
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Old 08-22-2009, 12:40 PM   #5
litowrx
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Quote:
Originally Posted by the suicidal eggroll View Post
http://www.thesuicidaleggroll.com/sti/7-18-09/

pics of the purge system are at
0557
0570
0571
0572

hope they help
Thanks dude! it seems i hooked them up correctly!

Thanks!
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Old 08-21-2009, 03:07 PM   #6
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Quote:
Originally Posted by litowrx View Post
Hey guys, i notice a few months ago, that i had a couple of hoses unhooked around the PCSV (purge control solenoid valve)

I found a diagram, and i decided to hook them up the way the diagram tells...

Just want to make sure this is correct... these have been unhooked, god knows how long... i havent had any problem but i guess its better this way...

This is the diagram i found:




So i go ahead and zip tied that blue coupler , because everytime i move something it pops put...

Are the circled hoses suppose to be hooked up?




This is what it looks like finished... is this the correct way?




Thanks!
not to thread jack or anything, but after looking at this stock setup i've realized. What do people do with aftermarket fuel rails when venting the valve off the evaporation pipe?

Aftermarket fuel rails would delete that evaporation pipe (the bottom pipe on the stock fuel rails Part C in the diagram) and would keep the blue nipple exposed. The only reason i ask is because i have aftermarket fuel rails coming and have been wondering where to vent that off to. Do you just use an extended hose?
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Old 08-21-2009, 03:16 PM   #7
Mechie3
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Take a line of fuel hose from the metal tube on the firewall, run it under the manifold and hook itup.
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Old 10-01-2010, 12:13 AM   #8
Geek Guy
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Quote:
Originally Posted by Mechie3 View Post
Take a line of fuel hose from the metal tube on the firewall, run it under the manifold and hook itup.
If you did that, then you would have both positive and negative pressure in the fuel tank... theoretically as much as positive pressure as what the turbo puts out. Pretty sure you don't want that

I'm trying to figure out how to delete the system properly - ideally a valve that only works when under negative pressure to deal with the fuel evap issue; I need to remove the solenoid.
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Old 07-24-2013, 09:34 AM   #9
Mechie3
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Quote:
Originally Posted by burtonboy759 View Post
What do people do with aftermarket fuel rails when venting the valve off the evaporation pipe?

Aftermarket fuel rails would delete that evaporation pipe (the bottom pipe on the stock fuel rails Part C in the diagram)
Quote:
Originally Posted by Mechie3 View Post
Take a line of fuel hose from the metal tube on the firewall, run it under the manifold and hook itup.
Quote:
Originally Posted by Geek Guy View Post
If you did that, then you would have both positive and negative pressure in the fuel tank... theoretically as much as positive pressure as what the turbo puts out. Pretty sure you don't want that
Just saw this old tidbit I posted and thought I should clarify. I didn't mean to run a hose from the firewall hose to the manifold. Rather, replace the metal line in the stock fuel rails with rubber fuel hose and hook that up to the purge assembly where the metal line used to hook up.

Last edited by Mechie3; 07-24-2013 at 09:44 AM.
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Old 08-22-2009, 08:09 PM   #10
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im having a problem with my PCV and I just want to confirm that the EJ205 in the 02 WRX has a different setup bc mine looks different.
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Old 09-27-2009, 03:07 PM   #11
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thanks for posting the pics up.
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Old 01-02-2010, 07:24 PM   #12
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thanks for the pics x2. I'm facing the same problem. Note to self...take pics before ripping things apart.
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Old 05-13-2011, 03:30 PM   #13
IA Performance
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Here is another option, it is free and avoids the hassle of the hoses coming off in the future. This is how the JDM ver7/8 STi cars are setup. We have lots of customer cars running this configuration without any CELs or negative side affects.

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Old 07-13-2011, 11:58 PM   #14
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Quote:
Originally Posted by IA Performance View Post
Here is another option, it is free and avoids the hassle of the hoses coming off in the future. This is how the JDM ver7/8 STi cars are setup. We have lots of customer cars running this configuration without any CELs or negative side affects.

Would this configuration work for an 02 wrx?

I found my PC solenoid hoses disconnected and one of the hoses looks like it was cut in half..i bought the wrx right when a used newer ej20 was added to it.. Thanks in advance.
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Old 07-14-2011, 01:29 PM   #15
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yes, it will work perfectly for 02-05 WRX cars.
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Old 08-28-2011, 05:40 PM   #16
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Quote:
Originally Posted by IA Performance View Post
Here is another option, it is free and avoids the hassle of the hoses coming off in the future. This is how the JDM ver7/8 STi cars are setup. We have lots of customer cars running this configuration without any CELs or negative side affects.

Two times in the 67K miles I put on my STi I had very strange AFR (super rich) at idle and easy driving.. the first time I messed with the purge valve and got it working (the valve seemed to want to be in exactly vertical position?).. well.. it happened again today after some intense tuning.... I performed the mod IA Performance suggested and the problems went away... I think the stupid valve was allowing boost to leak into the turbo inlet.

The only thing I noticed was that my purge valve bottom (from connector) port was connected to the evaporator tank .... the top port was connected to the intake... (backwards from the schematic IA Performance provided)

I made a few pulls after performing the mod.. my MAS voltage dropped (at given RPM/load) and it went slightly lean... I adjusted the intake calibration to address this and all is well....so far...

Thanks again IA Performance... for the super tip

Jeff
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Old 08-29-2011, 11:23 AM   #17
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happy to help. I'm now looking for the 04-06 and 2007 STi intake manifold diagrams so I may update this post with each model. If someone has these feel free to email over a screen shot to stephen@iaperformance.com

Stephen
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Old 03-28-2012, 10:14 AM   #18
FXTRunner
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Quote:
Originally Posted by IA Performance View Post
happy to help. I'm now looking for the 04-06 and 2007 STi intake manifold diagrams so I may update this post with each model. If someone has these feel free to email over a screen shot to stephen@iaperformance.com

Stephen
Were you able to ascertain any diagrams on the 07 manifold? I'm doing a 07 STI swap into an 05 Forester and have discovered the difference between the two and would like to see how to go about bypassing the dual purge control solenoid system.
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Old 01-31-2012, 10:28 PM   #19
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Quote:
Originally Posted by IA Performance View Post
So If im understanding this correctly, plug any lines going into intake manifold and inlet. You will be deleting everything from the line with the Blue T connector and replacing it with a straight line (green line in the diagram)?
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Old 02-01-2012, 01:10 AM   #20
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scootarida1 - you are 100% correct
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Old 08-06-2012, 10:03 AM   #21
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Quote:
Originally Posted by IA Performance View Post
Here is another option, it is free and avoids the hassle of the hoses coming off in the future. This is how the JDM ver7/8 STi cars are setup. We have lots of customer cars running this configuration without any CELs or negative side affects.

will it work if you delete the solenoid and just leave the evap line to vent to atmosphere?
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Old 12-28-2012, 03:25 PM   #22
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Quote:
Originally Posted by IA Performance View Post
Here is another option, it is free and avoids the hassle of the hoses coming off in the future. This is how the JDM ver7/8 STi cars are setup. We have lots of customer cars running this configuration without any CELs or negative side affects.
This is what I did, because my purge valve broke and don't wanna spend 150 for a piece of plastic.
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Old 09-25-2013, 06:32 PM   #23
Erdahl
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Quote:
Originally Posted by IA Performance View Post
Here is another option, it is free and avoids the hassle of the hoses coming off in the future. This is how the JDM ver7/8 STi cars are setup. We have lots of customer cars running this configuration without any CELs or negative side affects.

Waaaiiiit a minute! This horse isn't dead yet!
The fuel system is purging low pressure relative to boost pressure in the manifold.
If you bypass the purge control system like this, wouldn't it be like trying to burp with a 90psi air hose in your mouth once the purge control solenoid opens? My inclination would be to send the jumper to the vacuum side of the intake.
It appears to me, the purge control solenoid wouldn't run 100% duty with the car running so it's most likely "normally closed". Deriving from this assumption, it seems that another benefit to running the jumper to the intake is that it wouldn't matter which way you route your lines because the higher pressure manifold wouldn't be fighting the solenoid (if you plug your boosted line to the top port closest to the solenoid) or assisting (if you plug the boosted line into the bottom port).
Seems to me, running the jumper to the vacuum side would be like burping into a vacuum hose.
Thoughts?
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Old 05-13-2011, 08:56 PM   #24
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Is there somewhere to find the purpose of this hose routing? Emissions? If IA says it can go away without harm...what is subaru's reasoning for having it?
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Old 07-14-2011, 05:37 PM   #25
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So just cap those off and eliminate the purge altogether?
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