Welcome to the North American Subaru Impreza Owners Club Sunday March 7, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L 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. 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 01-03-2020, 06:27 PM   #1
Scooby Newbie
Member#: 510357
Join Date: Jan 2020
Chapter/Region: RMIC
Location: Colorado
2002 Wrx Wagon
Sedona Red

Default Boost oscillation

I'm sure this has been covered but most of the solutions I've found weren't applicable to my situation. So I've owned my 2002 wrx wagon for six or so months now. In the last 4 months it has been getting boost oscillations in 3rd-5th gear at anything over 3500 rpms. And has gotten worse in the last month or so. Here's a list of mods
STI VF39 turbo
STI blue injectors
New intake manifold gaskets
STI intercooler
New hoses throughout (silicone)
Newer 04 wrx transmission
Grimspeed headers
Grimspeed y-pipe
STI up pipe
Hks downpipe
Apexi cat back
New intake manifold gasket
Gfb respons hybrid bov
Cobb 3 port EBCS
Aeromotive 340lph
Heat wrapped SPT intake

I've smoke tested and sealed a couple leaks and inspected vac lines. I have a hunch it might be a boost leak but can't find anything obvious. Any help would be greatly appreciated as I've tried a ton of things to no avail
ebrosz is offline   Reply With Quote

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 08:38 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.