Welcome to the North American Subaru Impreza Owners Club Wednesday April 16, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Texas Impreza Club
Texas Impreza Club Forum sponsored by Gillman Subaru Houston
and Gillman Subaru San Antonio
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 Chapters > Texas Impreza Club Forum -- TXIC

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 04-02-2003, 10:17 AM   #1
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default I think I've got some fuel problems or ECU is screwed up. Maybe a bad sensor too(MAF)

Ok. Ever since the night we meet at Nick's Place last I've been having some problems under WOT.

1. The car runs good WOT all the way up until 4000RPM. Between 4K and 5K RPM it feels almost as like you were putting 0 psi of boost, relativley speaking. Then when it hits 5K it takes off like it's supposed to. It is more noticible the higher the gear, of course. Almost like a fuel hole.

2. A couple of times since then I've had double backfires on WOT. One time it felt like the engine may have missed pretty badly WOT, it felt like hitting the first *bump* on the rev limiter but I was at about 5500RPM but I heard no backfire or anything.

3. After a run in with an M3 in Austin off of 360 and him leading me to this BAD ASS windy, elevation changing backroad. After running the engine hard for 20min, the car no longer had problem number 1. But it's back now.

4. Power has been inconsistant also.

Any ideas?
* Registered users of the site do not see these ads.
GregUnd is offline   Reply With Quote
Old 04-02-2003, 10:40 AM   #2
Legacy777
Scooby Guru
 
Member#: 4800
Join Date: Mar 2001
Chapter/Region: TXIC
Location: Houston, Tx
Vehicle:
1990 Legacy & 97 OBS
AWD 5MT EJ22T AWIC Swap

Default

Try resetting the ECU, see what you notice or what problems stay or go away.
Legacy777 is offline   Reply With Quote
Old 04-02-2003, 11:00 AM   #3
D_REX
Scooby Specialist
 
Member#: 8945
Join Date: Aug 2001
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
MY02 WRX
Blue

Default

I've had similar problems, although not to that extreme, when I got a bad tank of gas. Power was flat in the mid range but started to pull hard again as boost started to taper.

What are you using for engine management now?
D_REX is offline   Reply With Quote
Old 04-02-2003, 11:38 AM   #4
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by D_REX
I've had similar problems, although not to that extreme, when I got a bad tank of gas. Power was flat in the mid range but started to pull hard again as boost started to taper.

What are you using for engine management now?
Still stock ECU @ 13-14psi. I've got 565cc's, fuel pump, fuel rail, and unichip sitting in my room. I'm waiting on the GOD DAM GEARS to get in before I install everything I have and go up to FIS to get tuned. Chalak is really starting to piss me off. I'm giving him until this Saturday to either come in contact with me, deliver my gears, or refund my money before I RUINE his reputation here in America....... and also I'm going to be taking this from a legal stand point. Since it was paid with a Credit Card, I can get my money back.
GregUnd is offline   Reply With Quote
Old 04-02-2003, 01:28 PM   #5
D_REX
Scooby Specialist
 
Member#: 8945
Join Date: Aug 2001
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
MY02 WRX
Blue

Default

Quote:
Originally posted by GregUnd


Still stock ECU @ 13-14psi. I've got 565cc's, fuel pump, fuel rail, and unichip sitting in my room. I'm waiting on the GOD DAM GEARS to get in before I install everything I have and go up to FIS to get tuned. Chalak is really starting to piss me off. I'm giving him until this Saturday to either come in contact with me, deliver my gears, or refund my money before I RUINE his reputation here in America....... and also I'm going to be taking this from a legal stand point. Since it was paid with a Credit Card, I can get my money back.
Just stop driving your car hard until you get the engine management installed. As far as Chalak goes, many others here have tried to ruin his reputation, you still bought his product
D_REX is offline   Reply With Quote
Old 04-02-2003, 01:32 PM   #6
Big_Hitter
Scooby Guru
 
Member#: 10831
Join Date: Oct 2001
Chapter/Region: TXIC
Location: Boise, ID
Vehicle:
2011 Ferd Ranger 4x4
2009 FXT Stage2

Default

worst case, sounds like an opportunity to try out the tuner at turbochargers.com

let us know how they do
Big_Hitter is offline   Reply With Quote
Old 04-02-2003, 01:56 PM   #7
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by D_REX

As far as Chalak goes, many others here have tried to ruin his reputation, you still bought his product
I heard bad things about his first gen gear sets and great things about his second gen gear sets so I bought them. Depending on his response to this letter I just wrote to him, I may let it loose on everything that's been hapening in the past few months between him and I. But until then, I have to keep hush hush.
GregUnd is offline   Reply With Quote
Old 04-02-2003, 02:05 PM   #8
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by Philistine
worst case, sounds like an opportunity to try out the tuner at turbochargers.com

let us know how they do

To hell with that idea!

No one is going to be doing any field testing on my car, such as...

"Let's see if the center diff holds up on this dyno or not"


Sheeeeeeiiiiiiiittt, you must got me straight trippin'... on tha real tho, dawg.... fo real, fo real doe
GregUnd is offline   Reply With Quote
Old 04-02-2003, 02:14 PM   #9
Big_Hitter
Scooby Guru
 
Member#: 10831
Join Date: Oct 2001
Chapter/Region: TXIC
Location: Boise, ID
Vehicle:
2011 Ferd Ranger 4x4
2009 FXT Stage2

Default



It's evident that you've been hanging out in the Shepherd/Crosstimbers area WAY too long!

Quote:
Originally posted by GregUnd
Sheeeeeeiiiiiiiittt, you must got me straight trippin'... on tha real tho, dawg.... fo real, fo real doe
Big_Hitter is offline   Reply With Quote
Old 04-02-2003, 02:48 PM   #10
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by Philistine


It's evident that you've been hanging out in the Shepherd/Crosstimbers area WAY too long!

Straight'd up, main, fo real doe. We'd just been kickin' it down at "lil' dope's" crib hittin' da killa, know whad'Im sayin dawg... buu we abaut to go'down to dat bitch, Shaquifa'tifa's, crib and I'm'on break dat ho' off dawg, fo'real doe main... make a muafuka say "UUUUUUUHHHhhhhhh" Main howd up!!
GregUnd is offline   Reply With Quote
Old 04-02-2003, 02:50 PM   #11
jmott
Scooby Guru
 
Member#: 6713
Join Date: May 2001
Chapter/Region: TXIC
Location: Houston TX USA
Vehicle:
2007 Prius
brown

Default

you have big injectors and a stock ecu and you are surprised your car isnt running right?
jmott is offline   Reply With Quote
Old 04-02-2003, 02:51 PM   #12
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by jmott
you have big injectors and a stock ecu and you are surprised your car isnt running right?

Shouldn't make a difference if they're not installed.........
GregUnd is offline   Reply With Quote
Old 04-02-2003, 02:57 PM   #13
jmott
Scooby Guru
 
Member#: 6713
Join Date: May 2001
Chapter/Region: TXIC
Location: Houston TX USA
Vehicle:
2007 Prius
brown

Default

Quote:
Originally posted by GregUnd



Shouldn't make a difference if they're not installed.........
ah

I thought you meant just the unichip was sitting in your room
jmott is offline   Reply With Quote
Old 04-02-2003, 03:00 PM   #14
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by jmott


ah

I thought you meant just the unichip was sitting in your room

just messin with you anyway
GregUnd is offline   Reply With Quote
Old 04-02-2003, 03:47 PM   #15
supermarkus
Scooby Guru
 
Member#: 6971
Join Date: May 2001
Location: Edmonds, Washington, USA
Vehicle:
2008 WRX STi
SSM

Default

Jon[inCT] outlined a procedure that makes the stock ECU relearn the long term fuel trim and allows you to run the STi injectors. I haven't tried it myself, but the guy he was helping said his stuttering and open loop performance got better. It seems as if the stock ECU can handle the bigger injectors just fine as long as they aren't low impedance injectors.
supermarkus is offline   Reply With Quote
Old 04-02-2003, 04:01 PM   #16
jmott
Scooby Guru
 
Member#: 6713
Join Date: May 2001
Chapter/Region: TXIC
Location: Houston TX USA
Vehicle:
2007 Prius
brown

Default

The stock ECU can learn to adjust for almost anything you throw at it in closed loop mode.

but in open loop mode (what happens when you floor it), you can't count on a simple correction factor thrown into the static maps to work. bigger injectors throw that system way out of its useful range.

it might almost work, or work when the weather is a certain way, yadda yadda yadda. Whatever hack you do to get the air/fuel ratio right, its really best to have a wideband O2 in there to monitor it and KNOW that you have it right. rather than just saying "oh well its not stuttering now, must be ok" who knows, maybe it got too lean!




Quote:
Originally posted by supermarkus
Jon[inCT] outlined a procedure that makes the stock ECU relearn the long term fuel trim and allows you to run the STi injectors. I haven't tried it myself, but the guy he was helping said his stuttering and open loop performance got better. It seems as if the stock ECU can handle the bigger injectors just fine as long as they aren't low impedance injectors.
jmott is offline   Reply With Quote
Old 04-02-2003, 04:23 PM   #17
supermarkus
Scooby Guru
 
Member#: 6971
Join Date: May 2001
Location: Edmonds, Washington, USA
Vehicle:
2008 WRX STi
SSM

Default

It was just a stop gap until the guy got engine management anyway. I never said anything about his open loop performance being tuned and perfect. He said it got better.
supermarkus is offline   Reply With Quote
Old 04-02-2003, 11:34 PM   #18
datdudedennis
Scooby Specialist
 
Member#: 3928
Join Date: Feb 2001
Location: Boston, MA
Vehicle:
2002 WRX sedan
WRB use to be MBP

Default

are you running the txs hpbc? if so i had the same problem due to the bleeder valve being fully closed.
datdudedennis is offline   Reply With Quote
Old 04-03-2003, 12:05 AM   #19
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by datdudedennis
are you running the txs hpbc? if so i had the same problem due to the bleeder valve being fully closed.
Nope, I'm running the ProfecB.

Actually after hooking up the deltadash this evening and then resetting the ECU, everything is %400 better and the engine is running like it should after data logging before and after the reset.
GregUnd is offline   Reply With Quote
Old 04-03-2003, 12:28 AM   #20
supermarkus
Scooby Guru
 
Member#: 6971
Join Date: May 2001
Location: Edmonds, Washington, USA
Vehicle:
2008 WRX STi
SSM

Default

could it be that your boost solenoid is kaput? I've heard bad things about the profec line of boost controllers. They're single solenoids right? Those can be prone to spiking.
supermarkus is offline   Reply With Quote
Old 04-03-2003, 10:04 AM   #21
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by supermarkus
could it be that your boost solenoid is kaput? I've heard bad things about the profec line of boost controllers. They're single solenoids right? Those can be prone to spiking.

dual sol's.
GregUnd is offline   Reply With Quote
Old 04-03-2003, 11:00 AM   #22
supermarkus
Scooby Guru
 
Member#: 6971
Join Date: May 2001
Location: Edmonds, Washington, USA
Vehicle:
2008 WRX STi
SSM

Default

I did a search and it seems the Profec A series were the ones people were having troubles with. Do you see any knock events in your datalogs? Do a bunch of DD runs and see if anything shows up.
supermarkus is offline   Reply With Quote
Old 04-03-2003, 12:23 PM   #23
GregUnd
Baaleted
 
Member#: 11800
Join Date: Oct 2001
Default

Quote:
Originally posted by supermarkus
I did a search and it seems the Profec A series were the ones people were having troubles with. Do you see any knock events in your datalogs? Do a bunch of DD runs and see if anything shows up.

I've done MANY DD runs and haven't seen knock once. Ussually knock correction is about 8.5-9.0max, which is good.
GregUnd 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
Madison, WI: think I've got alignment trouble Zongo Mid West Subaru Owners Club Forum -- MWSOC 21 01-13-2004 04:45 PM
I've got some problems thetikler1 Factory 2.0L Turbo Powertrain 15 08-11-2003 05:54 AM
By Jove I Think I've Got It BOY Normally Aspirated with bolt-on Forced Induction Powertrain 10 04-04-2003 09:18 AM
Screwed up my front O2 sensor the Dabbler Normally Aspirated with bolt-on Forced Induction Powertrain 10 08-28-2001 12:48 PM
('93-'01) I'm about to do some business but the board is screwed up! HELP ARG Impreza Forum 1 06-06-2001 09:41 PM


All times are GMT -4. The time now is 09:13 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.