Welcome to the North American Subaru Impreza Owners Club Wednesday September 17, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 10-05-2009, 12:12 AM   #251
fulltimeW.O.T.
Scooby Specialist
 
Member#: 120414
Join Date: Jul 2006
Chapter/Region: Tri-State
Location: North Jersey
Vehicle:
2009 WRX 5Dr DGM
Stage 2+Meth

Default

tempted to remove it in my 09. Would be the same thing i assume.
* Registered users of the site do not see these ads.
fulltimeW.O.T. is offline   Reply With Quote
Old 10-14-2009, 05:17 PM   #252
fast06wrxtr
Scooby Newbie
 
Member#: 206590
Join Date: Mar 2009
Chapter/Region: MWSOC
Location: Milwaukee, WI
Default

Quote:
Originally Posted by KSTech View Post
I am getting a lot of conflicting info from the Subaru manuals and from people I've talked to. I am not so sure the atmospheric pressure sensor is in one of these valves now. The manuals imply that the valve with a pressure sensor is to read air pump pressure for air pump diagnostics, not atm. pressure. Also talked to people who have removed both valve and had no issues.

Has anybody with a 2007+ removed both valves (and pump) and checked their atmospheric pressure reading? It should be constant - about 14.7psi at sea level and around 12.2 psi up at elevations around 5000' (like here).
I actually just left the thing in there. Can you log ATM pressure with a Cobb AP? If so, I'll try unplugging the valve this weekend and report what happens. This is in a MY06, though...
fast06wrxtr is offline   Reply With Quote
Old 10-18-2009, 09:59 AM   #253
05-rsx
Scooby Specialist
 
Member#: 101188
Join Date: Nov 2005
Location: Melbourne, Australia
Vehicle:
MY07 WRX Wagon
Black

Default

Some progress, and a few things of note:

1) I've been driving around my 07 with pump removed and both valves unplugged for a a week or two. Did not notice any ill effects.
Initally I did leave the Pass/Sensor valve plugged in, but as the block-off plates hadn't arrived, and it was still connected up to the head, this caused exhaust to leak 'backwards' out the solenoid on cold-starts for ~30s.
Also happened to have the car dynoed whilst the valves were unplugged. It wasn't quite as rich as I thought it'd be. I don't know if this is simply coincidence.





2) KS-Tech plates arrived from the US at the end of last week. As promised to Matt, I said I'd shoot up some pictures. Only did 'driver' (well technically 'passenger' for us RHD people) side. Simply didn't have the time to pull everything apart to get to the other side behind the turbo. Might attack this later when I do dumppipe.

Few pics of the beautifully produced KS gear. I take my hat off to these guys. OEM-like fitment and fantastic customer service.





The valve/solenoid/associated piping to be removed:



Blank on:





Also grabbed a (I believe in-prototype) cover for the solenoid, for if it does have to be kept on the 07 models. Like the block-blanks, fitment was perfect.
The only issue I did have was that the HD plastic plate is thinner than the OEM-metal flange. This meant that the RHS bolt bottomed out in it's thread in the cast housing before becoming snug on the plate.
Could be easily rectified by either:
-making the plate a bit thicker (difference pictured below)
-shortening the bolt.
That said, I doubt that bolt not getting snug will actually prohibit it's simple function of just preventing crap getting into the solenoid. But thought I should mention it none-the-less.





05-rsx is offline   Reply With Quote
Old 10-19-2009, 10:09 AM   #254
KSTech
Former Vendor
 
Member#: 143570
Join Date: Mar 2007
Location: Reno / Sparks, NV
Default

Quote:
Originally Posted by 05-rsx View Post
Also grabbed a (I believe in-prototype) cover for the solenoid, for if it does have to be kept on the 07 models. Like the block-blanks, fitment was perfect.
The only issue I did have was that the HD plastic plate is thinner than the OEM-metal flange. This meant that the RHS bolt bottomed out in it's thread in the cast housing before becoming snug on the plate.
Could be easily rectified by either:
-making the plate a bit thicker (difference pictured below)
-shortening the bolt.
That said, I doubt that bolt not getting snug will actually prohibit it's simple function of just preventing crap getting into the solenoid. But thought I should mention it none-the-less.

Thanks for the info, Campbell. That valve plate is actually black-anodized aluminum, not plastic. I used some allen-head screws on the one here, so that's why I didn't notice the bottoming out. We will have to include screws with it.
KSTech is offline   Reply With Quote
Old 10-19-2009, 09:18 PM   #255
Bad Noodle
Scooby Specialist
 
Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

Default

You would have to be a masochist to try and get the passenger side off without taking off the manifold and turbo:









stuff removed:

Bad Noodle is online now   Reply With Quote
Old 10-19-2009, 09:36 PM   #256
sch3838
Scooby Specialist
 
Member#: 154636
Join Date: Jul 2007
Chapter/Region: Tri-State
Default

i ended up cutting the pipe near the passenger side, it was pain in the ass because i didnt removed the up pipe, but its do-able. i didnt block off my atmospheric sensor, just 2 holes on the block. the car drove about 10K now, no problems, of course tuned and turned off CELS
sch3838 is offline   Reply With Quote
Old 11-01-2009, 12:20 AM   #257
QweQwe
Scooby Specialist
 
Member#: 30791
Join Date: Dec 2002
Location: Southern Cali
Default

Ive been reading up about it and i had a few questions.

Currently i have a 07 sti chassis and main harness with a 05 sti longblock

the 05 sti engine has no provisions for airpump

So my question is,
if i keep the Atmospheric pressure sensor plugged in does it not throw any check engine lights? i could also keep the airpump plugged in also.

if anyone could shed some light on this subject it would be greatly appreciated.

I would like to have no CEL and i have no problem running the airpump and atmospheric pressure sensor as i need to the smog the car since it is salvaged. I just dont want to deal with any headaches
QweQwe is offline   Reply With Quote
Old 11-01-2009, 12:22 AM   #258
QweQwe
Scooby Specialist
 
Member#: 30791
Join Date: Dec 2002
Location: Southern Cali
Default

also im looking to buy a atmospheric pressure sensor
QweQwe is offline   Reply With Quote
Old 11-13-2009, 03:24 PM   #259
boostdog
Scooby Specialist
 
Member#: 149752
Join Date: May 2007
Location: NW Arkansas
Vehicle:
07 wrx tr
rr tuned stg2 12.8@105mph

Default

Quote:
Originally Posted by sch3838 View Post
i ended up cutting the pipe near the passenger side, it was pain in the ass because i didnt removed the up pipe, but its do-able. i didnt block off my atmospheric sensor, just 2 holes on the block. the car drove about 10K now, no problems, of course tuned and turned off CELS

i did this last weekend w/a friend that had done it to his 07 sti. we removed the pump and the metal fitting that goes onto the block on the drivers side. we didn't do anything to the pieces on the pass side ( i kept telling him i think there's 2 holes on the block that need to be blocked off. )

is that correct? on an 07 wrx ( seems like there's alot of confusion as to what model has what and what to do to each one )

at start up i am hearing like a burrrrrr sound and goes away after a few seconds. is this from the atm meter or do i need to plug or remove something else?
boostdog is offline   Reply With Quote
Old 11-13-2009, 03:25 PM   #260
boostdog
Scooby Specialist
 
Member#: 149752
Join Date: May 2007
Location: NW Arkansas
Vehicle:
07 wrx tr
rr tuned stg2 12.8@105mph

Default

Quote:
Originally Posted by juanmedina View Post
This is what I removed




One of the stupid Ksketch plate was off, the holes where not concentric to the bolt holes so I have to fix them. Do you guys remove these two solenoids as well?











i removed all the parts above..exact same ones. Jaun did you have to block off / remove anything on the pass side?
boostdog is offline   Reply With Quote
Old 11-18-2009, 07:34 AM   #261
boostdog
Scooby Specialist
 
Member#: 149752
Join Date: May 2007
Location: NW Arkansas
Vehicle:
07 wrx tr
rr tuned stg2 12.8@105mph

Default

bump for answers please.
boostdog is offline   Reply With Quote
Old 11-18-2009, 09:56 AM   #262
jsnm
Scooby Specialist
 
Member#: 186356
Join Date: Aug 2008
Chapter/Region: MAIC
Location: Delaware
Vehicle:
2006 WRX-pte6262
CTS-V,& 05 RS

Default

so removing this on an 06 wouldnt throw any codes?
jsnm is offline   Reply With Quote
Old 11-19-2009, 12:25 PM   #263
juanmedina
Scooby Guru
 
Member#: 133146
Join Date: Nov 2006
Location: SC
Vehicle:
07 FPgreen 7.37@95
WRX VF39+E85 12.0, 121mph

Default

Quote:
Originally Posted by boostdog View Post
i removed all the parts above..exact same ones. Jaun did you have to block off / remove anything on the pass side?
Quote:
Originally Posted by boostdog View Post
bump for answers please.
sorry for delay, no you don't have to remove anything else. Just what you see on the pics

GL
juanmedina is offline   Reply With Quote
Old 11-19-2009, 12:31 PM   #264
kpluiten
Scooby Guru
 
Member#: 120273
Join Date: Jul 2006
Chapter/Region: SWIC
Location: AZ
Vehicle:
06 WRBWRXWGN
Now with 100% more Spec-C

Default

Quote:
Originally Posted by jsnm View Post
so removing this on an 06 wouldnt throw any codes?
Did you read the thread?? Of course it will throw codes. The pump is gone! Sensors are gone! However, a tuner can remove these codes.
kpluiten is online now   Reply With Quote
Old 11-19-2009, 12:36 PM   #265
jsnm
Scooby Specialist
 
Member#: 186356
Join Date: Aug 2008
Chapter/Region: MAIC
Location: Delaware
Vehicle:
2006 WRX-pte6262
CTS-V,& 05 RS

Default

i read what i could out of 11 pages while at work
jsnm is offline   Reply With Quote
Old 11-24-2009, 01:27 PM   #266
boostdog
Scooby Specialist
 
Member#: 149752
Join Date: May 2007
Location: NW Arkansas
Vehicle:
07 wrx tr
rr tuned stg2 12.8@105mph

Default

Quote:
Originally Posted by juanmedina View Post
sorry for delay, no you don't have to remove anything else. Just what you see on the pics

GL
great thanks man!
boostdog is offline   Reply With Quote
Old 11-27-2009, 04:25 PM   #267
Baay
Scooby Newbie
 
Member#: 139645
Join Date: Feb 2007
Vehicle:
07 WRX
UGM

Default

I can confirm some findings i have just tested,

If the 6 pin plug solenoid with the sensor is unplugged, the ECU will default to 21.71PSI reading. I plugged it back in and saw it fall to 14.22 PSI, and as far as i can see, the ECu has no other sensors for Atmospheric Pressure readings.

So, take from that what you want
Baay is offline   Reply With Quote
Old 12-03-2009, 11:31 AM   #268
TexRyker
Scooby Specialist
 
Member#: 199059
Join Date: Jan 2009
Chapter/Region: TXIC
Location: DFW
Vehicle:
08 STi Wagoneer
White/Gold

Default

On the 6 pin.... it is tied to several different sensors including the manifold pressure sensor. This problem might be able to be fixed with a resistor??

Here is the pinout:

LH Tied to:

1. Pin #1 Color:R
a. Elect. Throttle Cont.
b. Manifold Absolute Press. Sensor
c. Tumble Gen. Valve LH
d. Tumble Gen. Valve RH
e. ECU A19 (See chart)

2. Pin #3 Color: BL
a. Elect. Throttle Cont.
b. Manifold Absolute Press. Sensor
c. Engine coolant temp sensor
d. ECU A29 (See chart)
e. Knock Sensor
f. Tumble Gen. Valve LH
g. Tumble Gen. Valve RH

3. Pin #4 Color W
a. Engine GND

4. Pin #2 Color RY
a. A27 (See chart)

5. Pin #6 Color BR
a. Power from relay and fuse block

6. Pin #5 is empty

RH Tied to:

1.
a. Engine GND (Pin #1 Color: W)
b. Power from relay (Pin #2 Color: BrR)

TexRyker is offline   Reply With Quote
Old 12-15-2009, 02:02 AM   #269
tcr04
Scooby Newbie
 
Member#: 102871
Join Date: Dec 2005
Chapter/Region: SWIC
Location: Gilbert, AZ
Vehicle:
2006 wrx
Black

Default

is it possible to remove the CEL on a stock 06 wrx without removing the air pump?
tcr04 is offline   Reply With Quote
Old 12-15-2009, 11:07 AM   #270
06rexwagon
Scooby Specialist
 
Member#: 114730
Join Date: May 2006
Chapter/Region: SWIC
Location: Albuquerque, NM
Vehicle:
2006 WRX Limited Wag
9.9@142

Default

You can disable it, but why would you? Do you have a CEL from something failing?
06rexwagon is offline   Reply With Quote
Old 12-15-2009, 12:31 PM   #271
tcr04
Scooby Newbie
 
Member#: 102871
Join Date: Dec 2005
Chapter/Region: SWIC
Location: Gilbert, AZ
Vehicle:
2006 wrx
Black

Default

its throwing the p2444 code
tcr04 is offline   Reply With Quote
Old 12-24-2009, 06:43 AM   #272
slava from goshen
Scooby Specialist
 
Member#: 152176
Join Date: Jun 2007
Chapter/Region: MWSOC
Location: Goshen, IN
Vehicle:
2001 2xImpreza 2.5RS
BRP/SRP

Default

I removed entier system from 07 sti. hoses and all. the only thing left is the opening on drivers side head. I will put a plate there to shut it. after pro tune will I have issues?
slava from goshen is offline   Reply With Quote
Old 12-25-2009, 08:20 AM   #273
05-rsx
Scooby Specialist
 
Member#: 101188
Join Date: Nov 2005
Location: Melbourne, Australia
Vehicle:
MY07 WRX Wagon
Black

Default

Without a plate on that 'hole in the head', your exhaust will leak out, your turbo will not spool, and your car will run like ****.

Either put the plate on before you run it, or reattach the solenoid (although still unplugged from the connector) to 'seal' it.
05-rsx is offline   Reply With Quote
Old 01-30-2010, 08:09 PM   #274
Bariga
Scooby Specialist
 
Member#: 179846
Join Date: May 2008
Chapter/Region: NWIC
Location: Renton, WA
Vehicle:
07 STi Limited
EFR 7670 TS

Default

Have any one tired cutting that valve in half and just take out the connector with the sensor???
Bariga is offline   Reply With Quote
Old 01-30-2010, 10:50 PM   #275
Bariga
Scooby Specialist
 
Member#: 179846
Join Date: May 2008
Chapter/Region: NWIC
Location: Renton, WA
Vehicle:
07 STi Limited
EFR 7670 TS

Default

looks like no one has balls to do it, so i did it.






After i open it up i realize it was not necessary to cut anything, you can do it from top with sharp knife just cut and you set! Make sure you heat up the top of it for easy cutting!
Bariga is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Air pump removal + fail? 07 WRX. Badmunky Factory 2.5L Turbo Powertrain 13 04-29-2013 08:05 PM
WTB 06-07 Wrx AIR PUMP StageWrx Private 'Wanted' Classifieds 1 03-30-2009 10:44 PM
is it safe if i remove the restrictor on my wrx prlblkwrx02 Factory 2.0L Turbo Powertrain 44 03-24-2007 07:21 PM
Is it safe to switch to summer tires yet? It is March after all... Samirr76 Tri-State Area Forum 38 03-06-2003 09:25 PM


All times are GMT -4. The time now is 12:29 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.