Welcome to the North American Subaru Impreza Owners Club Monday September 27, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 09-19-2021, 01:02 AM   #26
subaru_gc8
Scooby Specialist
 
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
Vehicle:
2004 WRX wagon
silver

Default

so heres a question, why does he think that there is a boost leak?
* Registered users of the site do not see these ads.
subaru_gc8 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-19-2021, 05:26 AM   #27
josh13wrx
Scooby Newbie
 
Member#: 370711
Join Date: Oct 2013
Default

Quote:
Originally Posted by subaru_gc8 View Post
so heres a question, why does he think that there is a boost leak?

He mentioned that the ecu is asking for more boost but not getting any. Target boost should be 20psi but canít reach it.
josh13wrx is offline   Reply With Quote
Old 09-19-2021, 08:53 AM   #28
subaru_gc8
Scooby Specialist
 
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
Vehicle:
2004 WRX wagon
silver

Default

so when I had a boost leak, you can really tell when the boost just acted funny, like it was really hard to keep the pressure up on it and it would surge a little. could you make a video of what your boost gauge is doing?
subaru_gc8 is offline   Reply With Quote
Old 09-19-2021, 09:06 AM   #29
undyjr
Scooby Specialist
 
Member#: 459692
Join Date: Dec 2016
Chapter/Region: South East
Location: Hampton Roads Va
Vehicle:
2019 WRX STI
silica black

Default

Quote:
Originally Posted by josh13wrx View Post
Something just came to mind but I donít have time to check tonight. Could it be the cat in the downpipe is bad. Itís an aftermarket 3in downpipe from Rev9. Probably not the highest quality cat but can this be a possibility? Iím just grabbing at straws here haha
$180 for a catted down pipe? What can go wrong? What did your tuner recommend?
undyjr is offline   Reply With Quote
Old 09-19-2021, 09:49 AM   #30
josh13wrx
Scooby Newbie
 
Member#: 370711
Join Date: Oct 2013
Default

Quote:
Originally Posted by undyjr View Post
$180 for a catted down pipe? What can go wrong? What did your tuner recommend?

It was on the car. Iím gonna drop it and see if thatís the issue if so at least itís a straight forward fix
josh13wrx is offline   Reply With Quote
Old 09-19-2021, 09:51 AM   #31
josh13wrx
Scooby Newbie
 
Member#: 370711
Join Date: Oct 2013
Default

Quote:
Originally Posted by subaru_gc8 View Post
so when I had a boost leak, you can really tell when the boost just acted funny, like it was really hard to keep the pressure up on it and it would surge a little. could you make a video of what your boost gauge is doing?

That is pretty accurate description of what happens to me. Gets to 11psi and then struggles to 13 around 5k rpm but wonít go past that.
josh13wrx is offline   Reply With Quote
Old 09-24-2021, 04:44 PM   #32
josh13wrx
Scooby Newbie
 
Member#: 370711
Join Date: Oct 2013
Default

So the problem is not exhaust related. So close to just lighting the car on fire.
josh13wrx is offline   Reply With Quote
Old 09-25-2021, 09:24 AM   #33
djoye
Scooby Specialist
 
Member#: 50072
Join Date: Dec 2003
Chapter/Region: South East
Location: TN
Vehicle:
2017 STI
Blue

Default

It might be worth finding someone locally with a 3-port BCS (Grimmspeed, Cobb, etc., they're all basically the same but I'd find someone with a plug-n-play model for simplicity), swap another in and see if anything changes because they can be bad. Also check for obstructions in the BCS fittings. Ensure anything that has been removed from the intake manifold is capped, especially in the area where that purge control solenoid is located next to the PS pump and alternator.



Check that anything associated with the highlighted fitting or hose is either capped or connected to something.
djoye 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

All times are GMT -4. The time now is 02:26 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.