Welcome to the North American Subaru Impreza Owners Club Friday July 25, 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 > Open Source 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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 06-15-2013, 11:49 AM   #1
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default Relatively quick OL tuning question

Hey Guys,

Alright so i'm trying to understand why my OL tune is so rich. Well 10ish then it jumps up to 10.8ish as I reach redline. It happens when i'm going into boost, full throttle. Partial throttle its fine and closed loop is great.

My learning view seems good at 50g+. Im getting about -0.1%. Anywho I was wondering if I should fart around with the MAF scale or just lean it out in my open loop map. I feel though that the MAF scaling is good otherwise my learning view readings would be totally off?

I could edit the learning view to show more range in open loop for the MAF reading. Right now I just have 50+ range so its not very informative, maybe I have a section thats way off?

Any help would be awesome.

Oh if it matter I have a catless dp with the rear o2 still intact. I don't have any codes or anything, I just read around that it might cause the richness? Thought id put that in here.

Thanks!
* Registered users of the site do not see these ads.
OC_Nooby is offline   Reply With Quote
Old 06-15-2013, 12:48 PM   #2
dux10
NASIOC Supporter
 
Member#: 235338
Join Date: Jan 2010
Chapter/Region: South East
Location: Georgia
Vehicle:
2002 Faggin Wagon
srp

Default

What other mods do you have?
The LV values are only for learned correction values based on CL correction. In other words, it has very little bearing on how well you maf scaling is beyond say 80g/s (this is roughly the limit of "d range"). It sounds like you need to scale your MAF to hit your target AFR.

Steve @ Pullz-On Tuning
dux10 is offline   Reply With Quote
Old 06-15-2013, 12:49 PM   #3
Jubert69
Scooby Specialist
 
Member#: 167739
Join Date: Dec 2007
Chapter/Region: Tri-State
Location: CT
Vehicle:
04 WRX
ej207 spec C 18g

Default

Post your OL fueling map.

If it's a good map, just do a maf scaling.
Jubert69 is offline   Reply With Quote
Old 06-15-2013, 03:17 PM   #4
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

The OL MAP looks good!

I'll scale the maf, I didn't know the learning view stops at 80g/s ish.

Thanks guys!
OC_Nooby is offline   Reply With Quote
Old 06-16-2013, 12:32 PM   #5
dux10
NASIOC Supporter
 
Member#: 235338
Join Date: Jan 2010
Chapter/Region: South East
Location: Georgia
Vehicle:
2002 Faggin Wagon
srp

Default

Its not the learning view, its the ECU's "D range" learned values. Once the car is in open loop the car no longer makes corrections via AF correction or AF learning.

Steve @ Pullz-On Tuning

Quote:
Originally Posted by OC_Nooby View Post
The OL MAP looks good!

I'll scale the maf, I didn't know the learning view stops at 80g/s ish.

Thanks guys!
dux10 is offline   Reply With Quote
Old 06-16-2013, 01:19 PM   #6
the suicidal eggroll
Scooby Guru
 
Member#: 51961
Join Date: Jan 2004
Chapter/Region: RMIC
Location: Broomfield, CO
Vehicle:
2005 STi
2012 WRX

Default

Quote:
Originally Posted by dux10 View Post
Once the car is in open loop the car no longer makes corrections via AF correction or AF learning.
Yes it does. When you switch to OL, AFC goes to zero, but AFL is still applied. AFL D will keep being applied all the way to redline.
the suicidal eggroll is offline   Reply With Quote
Old 06-16-2013, 04:33 PM   #7
dux10
NASIOC Supporter
 
Member#: 235338
Join Date: Jan 2010
Chapter/Region: South East
Location: Georgia
Vehicle:
2002 Faggin Wagon
srp

Default

I've never had a car with that problem. I could've sworn D range was capped in the ECU at like 80g....

Steve @ Pullz-On Tuning
dux10 is offline   Reply With Quote
Old 06-17-2013, 09:36 PM   #8
robbyredneck
Scooby Newbie
 
Member#: 346999
Join Date: Feb 2013
Location: upstate
Vehicle:
2003 wrx
blue

Default

Quote:
Originally Posted by the suicidal eggroll View Post
Yes it does. When you switch to OL, AFC goes to zero, but AFL is still applied. AFL D will keep being applied all the way to redline.
i was fighting this. it has you asking "why the hell am i creeping leaner"
robbyredneck is offline   Reply With Quote
Old 06-27-2013, 08:28 AM   #9
RaceFaceXC
NASIOC Supporter
 
Member#: 165749
Join Date: Dec 2007
Chapter/Region: South East
Location: stupid Florida
Vehicle:
2007 No YELLING
on the bus!

Default

Quote:
Originally Posted by dux10 View Post
I've never had a car with that problem. I could've sworn D range was capped in the ECU at like 80g....

Steve @ Pullz-On Tuning
D range may end at 80 but the long term correction from D range is applied to OL. If the fueling correction was not applied then the minor differences from one engine/intake to another would not be compensated for in OL.

Last edited by RaceFaceXC; 06-27-2013 at 01:20 PM.
RaceFaceXC is offline   Reply With Quote
Old 06-27-2013, 10:29 AM   #10
wgr73
Scooby Specialist
 
Member#: 232458
Join Date: Dec 2009
Chapter/Region: SWIC
Location: Las Cruces, El Paso
Vehicle:
2008 STi (OBP)
CAMTuning.com

Default

Quote:
Originally Posted by robbyredneck View Post
i was fighting this. it has you asking "why the hell am i creeping leaner"

OP is going from 10.0 @ WOT to 10.8 at redline (?). He needs to rescale his maf if his fuel table is ok. He's creeping leaner due to his fuel table or his maf scale.

Op, if your D-range is anything other than zero in your learning view, then +/- x.xx% is being applied to your WOT afr. Keep this in mind.
wgr73 is online now   Reply With Quote
Old 06-27-2013, 03:40 PM   #11
OC_Nooby
Scooby Specialist
 
Member#: 311781
Join Date: Feb 2012
Location: Canada
Vehicle:
2003 WRX w STI V8

Default

Quote:
Originally Posted by wgr73 View Post
OP is going from 10.0 @ WOT to 10.8 at redline (?). He needs to rescale his maf if his fuel table is ok. He's creeping leaner due to his fuel table or his maf scale.

Op, if your D-range is anything other than zero in your learning view, then +/- x.xx% is being applied to your WOT afr. Keep this in mind.
Its +0.10 in D.
OC_Nooby 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 02:55 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.