Welcome to the North American Subaru Impreza Owners Club Sunday July 13, 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 > Engine Management & Tuning > AccessPort

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 10-17-2012, 04:54 PM   #1
suBooneru
Scooby Newbie
 
Member#: 104901
Join Date: Jan 2006
Chapter/Region: BAIC
Location: Sebastopol, Ca.
Vehicle:
2014 Forester XT
White

Default 2012 WRX TP Stage 1 Feedback knock?

So this tune was originally running really good on my car and today after doing a log I noticed what looked to me like some major feedback knock and a little fine knock learning. Still hitting right about target boost and everything else looks decent to me except the ignition timing is all over the place.

https://docs.google.com/spreadsheet/...DVDVnN5dkpoMnc

Any ideas on what could be going on here? Is it possibly just bad gas or something minor or should I be worried to do another log? I live in California and I know they recently went to a cheaper winter blend of fuel that I think has higher ethanol content or something.

For now I was thinking of switching to the more conservative COBB ACN 91 map to be safe and maybe do a log with that...
* Registered users of the site do not see these ads.
suBooneru is offline   Reply With Quote
Old 10-17-2012, 11:24 PM   #2
nyrangerfan222
Scooby Newbie
 
Member#: 308858
Join Date: Feb 2012
Chapter/Region: Tri-State
Vehicle:
2014 wrx hatch
Plasma blue pearl

Default

have you tried emailing eric? he is always fast to respond to emails and send out new revisions of the tune for you.
nyrangerfan222 is offline   Reply With Quote
Old 10-17-2012, 11:59 PM   #3
mikeydrives1
Scooby Specialist
 
Member#: 262117
Join Date: Oct 2010
Chapter/Region: Tri-State
Vehicle:
2001 Forester
STi II type M

Default

Perhaps it needs a little bit more Open Loop fueling? Thats quite a bit of knock and fine knock learning registering at the lower end of that pull before it corrects itself. Do logs of pulls on the conservative 91oct map and see if those numbers change.
mikeydrives1 is offline   Reply With Quote
Old 10-18-2012, 04:21 AM   #4
suBooneru
Scooby Newbie
 
Member#: 104901
Join Date: Jan 2006
Chapter/Region: BAIC
Location: Sebastopol, Ca.
Vehicle:
2014 Forester XT
White

Default

Quote:
Originally Posted by nyrangerfan222 View Post
have you tried emailing eric? he is always fast to respond to emails and send out new revisions of the tune for you.
Yeah I've been talking to him and he's been helping me out with some recommendations and stuff. When I first bought the map from him he was very helpful as well, tweaking the map until it was running good and got all of the knock out, even though it was a very minimal amount in the first place.

Not sure why all of the sudden it's acting up now though. He was thinking it could be false knock from something like an exhaust heat shield rattling around in the engine bay, but the the car is stock besides the custom stage 1 tune and I haven't really messed with anything in there besides taking the intercooler off to fix a leak at the IC to TB hose. Everything seems bolted back up correctly as far as I can tell.
suBooneru is offline   Reply With Quote
Old 10-22-2012, 04:25 AM   #5
suBooneru
Scooby Newbie
 
Member#: 104901
Join Date: Jan 2006
Chapter/Region: BAIC
Location: Sebastopol, Ca.
Vehicle:
2014 Forester XT
White

Default

So I switched over to the more conservative COBB ACN 91 map and now everything's looking good to me with no knock. Weird. I was thinking maybe a boost leak with the TP map because of the higher boost, but I'm reaching the target just fine.

Anyway here's the most recent couple of logs running the COBB map:

https://docs.google.com/spreadsheet/...DZXa0U4YkVnaUE

https://docs.google.com/spreadsheet/...lZyOTZ3djN5bGc

They look good now right?
suBooneru 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 06:31 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.