Welcome to the North American Subaru Impreza Owners Club Monday September 22, 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

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 10-24-2002, 12:52 AM   #1
wcbjr
Scooby Guru
 
Member#: 4001
Join Date: Feb 2001
Location: I love spherical bearings!
Vehicle:
2006 Legacy GT
Obsidian black

Default Rich idle with Link

While trying to get a decent idle to put the car on the dyno yesterday, we couldn't get the A/F ratio to go better than 10.5:1. Lots of black smoke from the exhaust. Removing fuel with the Link wouldn't do a thing. It's like the settings weren't being saved at all. I know it's not much to go off of, but any ideas?
* Registered users of the site do not see these ads.
wcbjr is offline   Reply With Quote
Old 10-24-2002, 04:15 AM   #2
skywalker
Scooby Specialist
 
Member#: 1990
Join Date: Jul 2000
Location: San Diego, CA
Default

Try lowering the fuel to the point where the car wants to die. What is your O2 reading at?

What is your hot and cold idle values set at?

What is your overrun vaccuum and clamp set at?

What are you idle timing values set at?

PM me...
skywalker is offline   Reply With Quote
Old 10-24-2002, 06:58 AM   #3
wcbjr
Scooby Guru
 
Member#: 4001
Join Date: Feb 2001
Location: I love spherical bearings!
Vehicle:
2006 Legacy GT
Obsidian black

Default

You've been pm'ed
wcbjr is offline   Reply With Quote
Old 10-24-2002, 10:00 AM   #4
WRC 555
Scooby Newbie
 
Member#: 94
Join Date: Jul 1999
Chapter/Region: MAIC
Vehicle:
1999 2.5 RS-T RBP
EJ257 Hybrid Link'd

Default

After you check on what skywalker said, you should be able to run around a 12:1 at idle. You have to run a little richer in idle because the car will stall when you do little things like turn the steering wheel or even turn up the windows when the car is in idle.

Good luck.
WRC 555 is offline   Reply With Quote
Old 10-24-2002, 10:30 AM   #5
wcbjr
Scooby Guru
 
Member#: 4001
Join Date: Feb 2001
Location: I love spherical bearings!
Vehicle:
2006 Legacy GT
Obsidian black

Default

Ok, I will tell Jason (FIS), thanks.
wcbjr is offline   Reply With Quote
Old 10-24-2002, 11:39 AM   #6
Midwayman
Scooby Specialist
 
Member#: 1997
Join Date: Jul 2000
Chapter/Region: MWSOC
Location: Des Plaines, IL
Vehicle:
2006 Acura TL 6spd
STMGM6 alumni

Default

Quote:
Originally posted by WRC 555
After you check on what skywalker said, you should be able to run around a 12:1 at idle. You have to run a little richer in idle because the car will stall when you do little things like turn the steering wheel or even turn up the windows when the car is in idle.

Good luck.
Shouldnt you be able to fix that with the voltage compensation instead?
Midwayman is offline   Reply With Quote
Old 10-24-2002, 11:47 AM   #7
8Complex

Moderator
 
Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
Vehicle:
04 FXT
Red

Default

Well, if you turn the wheel, it is strictly load on the motor. Windows and whatnot is voltage correction, though.
8Complex is offline   Reply With Quote
Old 10-24-2002, 11:48 AM   #8
JenisonWRX
Scooby Specialist
 
Member#: 6049
Join Date: Apr 2001
Chapter/Region: MWSOC
Location: Jenison.Doomhammer
Vehicle:
02 WRX & 99 RS
Black

Default

Quote:
Originally posted by Midwayman


Shouldnt you be able to fix that with the voltage compensation instead?
Yes ... my voltage correction is at 20

I bumped my timing to 2 at idle (total of 12 degrees) ... my idle is rock solid.

However, Link has a HUGE rep of not being able to have a lean-er idle. I've talked with tuners of other versions of Link ecus and they just can't get it down like they can with others.

Oh well ... at least I got it solid as stock was.
JenisonWRX is offline   Reply With Quote
Old 10-24-2002, 12:11 PM   #9
davidm_sh
Scooby Specialist
 
Member#: 5994
Join Date: Apr 2001
Location: Fort Collins, CO
Vehicle:
2004 Impreza WRX STi
Java Black

Default

When I had the Link I managed to get a rock solid idle with a A/F around 14-15:1. Do a search on my username and "Link" going back about 6 months. There is a thread where I struggled through getting the idle right.

Basically it had to do with adjusting the fuel clamp setting down around 30-35kPa range. The map I started with had it set around 44-48kPa range and when I tried turning it down it would almost die on me so each time I turned it down a little I had to INCREASE fuel in cells 205-305 range.

What you are shooting for is the fuel master clamp = your kPa range where your car likes to idle. I was at 6000ft above sea level so I would imagine you would want to set that setting maybe even lower becuase you get even more vacuum at sea level.

Anyway hope this helps a little.
davidm_sh is offline   Reply With Quote
Old 10-24-2002, 12:32 PM   #10
8Complex

Moderator
 
Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
Vehicle:
04 FXT
Red

Default

Quote:
Originally posted by JenisonWRX
I bumped my timing to 2 at idle (total of 12 degrees) ... my idle is rock solid.
Is that figuring in the +10 or so that is a base timing? I run like 18-20 at idle on my Haltech... granted we do have quite different motors...
8Complex is offline   Reply With Quote
Old 10-24-2002, 01:03 PM   #11
JenisonWRX
Scooby Specialist
 
Member#: 6049
Join Date: Apr 2001
Chapter/Region: MWSOC
Location: Jenison.Doomhammer
Vehicle:
02 WRX & 99 RS
Black

Default

Quote:
Originally posted by 8Complex


Is that figuring in the +10 or so that is a base timing? I run like 18-20 at idle on my Haltech... granted we do have quite different motors...
yes 12 degrees TOTAL advance. I bumped it from 10 (0 value in map) to 12 (2 value in map)
JenisonWRX is offline   Reply With Quote
Old 10-24-2002, 01:15 PM   #12
wcbjr
Scooby Guru
 
Member#: 4001
Join Date: Feb 2001
Location: I love spherical bearings!
Vehicle:
2006 Legacy GT
Obsidian black

Default

Sounds like we'll just get the idle above 13:1 for the dyno today and try things myself at home later on. We can tune around the problem since I really don't care how much power I'm making at 800 rpm. Thanks for all the replies.
wcbjr is offline   Reply With Quote
Old 10-24-2002, 01:56 PM   #13
Chav
Scooby Specialist
 
Member#: 3269
Join Date: Dec 2000
Chapter/Region: SCIC
Location: San Diego
Vehicle:
2001 2.5RS Sedan STM
RSTi

Default

I've got the idle on my Link 2 with ludespeed stage II and rc440s to rock steadily between 16:1 and 14:1 (according to my narrow band o2). The car will not stall either.

Here is the post davidm_sh was talking about

On the second page I describe how to get the idle to where I have mine.

-Chav

P.S. It is possible! Don't give up.
Chav is offline   Reply With Quote
Old 10-24-2002, 02:10 PM   #14
wcbjr
Scooby Guru
 
Member#: 4001
Join Date: Feb 2001
Location: I love spherical bearings!
Vehicle:
2006 Legacy GT
Obsidian black

Default

Lol. I already forwarded that exact post to Jason at FIS!
wcbjr is offline   Reply With Quote
Old 10-24-2002, 02:41 PM   #15
skywalker
Scooby Specialist
 
Member#: 1990
Join Date: Jul 2000
Location: San Diego, CA
Default

Out of anything on the Link that is the hardest thing to tune. It is the idle section. There are so many different values to play with and every single car is different, so there is no set value for all cars but there is a good range to be in.

Idle is just something you have to play around with or have a tuner play around with it.
skywalker is offline   Reply With Quote
Old 10-25-2002, 02:31 PM   #16
Pi7467mp
Scooby Newbie
 
Member#: 19124
Join Date: May 2002
Location: Northern Colorado
Vehicle:
2009 Nissan GTR
RED Premium

Default

Here is the scenario... I used to have a 1994 Acura Integra with a supercharger running 10psi of boost. I had a walbro 255lph fuel pump, RRFPR, and 330cc injectors. Needless to say the damn thing was running hella fat. There is a company by the name of Endyn that specializez in Jackson racing superchargers so I called them and asked them what to do. They said it is an easy fix. All you have to do is take off the stock fuel pressure reghulator and drill a relief hole so the excess pressure will subside. It is a little hard to explain so I will post a link. This fix is for Honda and acura, but the regulator is almost identical.
I treid this mod on my 2000 Impreza 2.5 RS Turbo and itmade the worl of difference. Idle is smooth, and you can smell a cleaner burning exhaust.. well anyway here is the link.
post any replies.
http://www.theoldone.com/articles/regulator/
Pi7467mp is offline   Reply With Quote
Old 10-27-2002, 08:07 PM   #17
davidm_sh
Scooby Specialist
 
Member#: 5994
Join Date: Apr 2001
Location: Fort Collins, CO
Vehicle:
2004 Impreza WRX STi
Java Black

Default

Quote:
Originally posted by Pi7467mp
Here is the scenario... I used to have a 1994 Acura Integra with a supercharger running 10psi of boost. I had a walbro 255lph fuel pump, RRFPR, and 330cc injectors. Needless to say the damn thing was running hella fat. There is a company by the name of Endyn that specializez in Jackson racing superchargers so I called them and asked them what to do. They said it is an easy fix. All you have to do is take off the stock fuel pressure reghulator and drill a relief hole so the excess pressure will subside. It is a little hard to explain so I will post a link. This fix is for Honda and acura, but the regulator is almost identical.
I treid this mod on my 2000 Impreza 2.5 RS Turbo and itmade the worl of difference. Idle is smooth, and you can smell a cleaner burning exhaust.. well anyway here is the link.
post any replies.
http://www.theoldone.com/articles/regulator/
I think the reason this worked for you is you proabably had your fuel pressure very high (like most JRacing applications) at idle (probably around 50-60ish I assume)? Oh wait I just saw you had bigger injectors... either way though solution will work for your case BUT we are dealing with a stand alone ECU that is a little "rough around the edges" when it comes to fine tuning things like idle, cruising, etc... (compared to the stock ECU). Where as you were trying to tack/patch/piggyback the stock ECU which was designed for a certain injector size and fuel pressure that it does not have any control over. Now I would assume your ECU (like ours) can compensate up to about a 25% larger injector than stock but it won't be as smooth.

Also I thought Endyn turned out to be somewhat of a hoax? I followed the superchargedIntegra board for a while and it turned out this guy was working out of his garage AFTER making everyone believe he had this HUGE company building front and was such a big tuner of sorts... ? Just wondering about that.
davidm_sh 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
ej207 v5 swapped from vf28 to vf34 not runs rich @ idle impreziv25 Subaru Conversions 6 05-24-2007 04:46 PM
1.8->2.2 rich @ idle question drewdogg Subaru Conversions 1 01-20-2006 12:48 PM
insanely rich idle kwiktsi Factory 2.0L Turbo Powertrain 4 02-03-2005 08:16 AM
Help - stg4 installed, bogging, CEL, RICH idle whiterabbit Factory 2.0L Turbo Powertrain 11 11-17-2003 11:18 PM
Rich Idle fix!!! Pi7467mp Engine Management & Tuning 5 10-28-2002 10:33 AM


All times are GMT -4. The time now is 03:18 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.