Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > Commercial ECU Reflashes

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 10-02-2007, 11:23 AM   #1
Broxma
Scooby Specialist
 
Member#: 158006
Join Date: Aug 2007
Chapter/Region: TXIC
Location: San Antonio
Vehicle:
2003 WRX IdleWagon
1992 GVR4 379/1000

Default strange boost occilation

Need a little help figuring this one out so some background first is in order I suppose.

03 WRX Stage 2 XPT Map
Stock TD04 P&P
Gutted up
Catless TBE
Perrin EBCS running Interrupt

So before the P&P on the turbo I was running the EBCS in Bleed mode, hitting target boost everything was great except the spool was pretty slow.

So I P&P the turbo and run the EBCS interrupt mode, and I start getting wild Boost spikes, like up to 20 psi then dropping to 10.

So I cut the Dynamic Burst in half as per Jeff at Perrin, now I am hitting 17 psi but instead of it simply dropping down to say 14 and holding, it fluctuates between 12 and 17. Boosts up to 17, drops down, back up, repeat. Oddly, it only does this at WOT. If I am only about 75% throttle, it will hold at whatever the target boost is for that RPM, about 12 psi at 75%.

What tables specifically would affect that type of behavior? I haven't cut the WG Duty cycle down yet and that is my next step, but I was hoping some uber tuner with more experience than me might have some idea's.

/Brox
Broxma 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Strange boost problem with a strange dealer diagnosis. Help? Computergeek24 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 12 10-09-2006 12:34 PM
strange boost fluctuation...help needed KJR Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 0 01-05-2004 10:44 PM
help: Strange boost levels kitbar Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 11-05-2003 01:42 PM
Need Help With Strange Boost Noise Plz zombiedog Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 2 06-30-2003 04:17 PM
Strange Boost above 3000 rpm... Flacco Normally Aspirated Powertrain 8 09-25-2001 03:15 AM

All times are GMT -4. The time now is 10:26 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.