Welcome to the North American Subaru Impreza Owners Club Friday November 21, 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 > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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 07-31-2003, 06:54 PM   #151
dlowman
Scooby Specialist
 
Member#: 22998
Join Date: Aug 2002
Vehicle:
2004 WRX STi
GT35R 572 whp 93/meth

Default

Guys,
One guy I know of has already had the reflash done with no worries. Mine is being done as we speak. I should have it back on tuesday if all goes well. Till then I am in my loaner car courtesy of Porter at Gwinnett Subaru's.

Dan
* Registered users of the site do not see these ads.
dlowman is offline   Reply With Quote
Old 07-31-2003, 07:22 PM   #152
hatchy
Scooby Specialist
 
Member#: 36852
Join Date: May 2003
Location: North West
Vehicle:
2004 STI

Default

Can I just take out the ECU and give it to the dealer for the reflash? I don't need a loaner and my car would be perfectly happy in sitting in my garage without a brain.
hatchy is offline   Reply With Quote
Old 07-31-2003, 07:40 PM   #153
mfisch
Scooby Newbie
 
Member#: 28591
Join Date: Nov 2002
Default

i seriously doubt the dealer will let you pull the ECU - that would be too easy, but they may have liability/warranty issues.

i finally brought mine (2600 miles now) in for the reflash - i had been running a mix of race gas (100 octane - from a 76 station) and 91 octane from chevron (tucson) which brought the octane up to 94. things were cool for ~2 weeks but today i got det bad and stopped by the dealer. no problem w/the tech reproducing the det. they'll give me a loaner for a few days while they send it (the ECU) back to cherry hill or wherever.

the SOA dude onsite said the the ECU will relearn w/the higher octane gas and det will come back - it did. he also said the diff disable thing in the ebrake was BS...

i mentioned that some ppl on the 'net seemed to be impressed by the speed at which SOA got the fix out there - citing serious time issues with getting a map through the EPA or whoever. he said it was easy as they are decreasing timing vs. increasing. i reckon there is less of an env impact worry with decreasing their crazing timing at ~4000 rpm

heheh, this aint isht (as far as impacting my satisfaction with a product). try an s2000 out for a real disappointment - after making excuses for a POS car for almost 3 years i dumped it, ended up with my wife's '02 WRX (gee how did she end up with one of those?) and there was no turning back - the '02 turned into an '04 STi (thank you Galles-Davis) - hey i got permission first!

'dios,

-mike
mfisch is offline   Reply With Quote
Old 07-31-2003, 07:57 PM   #154
KoneKiller
Scooby Specialist
 
Member#: 39191
Join Date: Jul 2003
Location: Houston
Vehicle:
2004 WRX STi WRB
Red 1990 Spec Miata

Default

Quote:
Originally posted by mfisch
he also said the diff disable thing in the ebrake was BS...

Huh? BS as in it doesn't do that? or BS in that it isn't worth doing?

Sorry this is off thread.... but I gotta know!
KoneKiller is offline   Reply With Quote
Old 07-31-2003, 08:07 PM   #155
Ringboy
Scooby Newbie
 
Member#: 40693
Join Date: Jul 2003
Vehicle:
2004 WRX STi
WRB

Default Re: Re: Lucky

Quote:
Originally posted by wolverine


My experience shows that if I don't WOT between the 4k to 5k mark, and then WOT after 5k up to red-line, I don't get det either. It is only when I WOT at low rpms and keep it there until I hit 4K-5K range, that's when I get det.
This is exactly what I am experiencing. Wolverine, are you having your's reflashed? Can anyone make any comments yet if they have had their's done?
Ringboy is offline   Reply With Quote
Old 07-31-2003, 08:12 PM   #156
hatchy
Scooby Specialist
 
Member#: 36852
Join Date: May 2003
Location: North West
Vehicle:
2004 STI

Default

Pulling the ECU is only a few 10 or 12mm bolts, but I see your point. I've pulled the ECU a few months ago and it was really easy. The dealer doesn't know about the reflash. Neither does 1800subaru3. And I guess they won't until the reflash is out of "beta".

How did you guys get on the list? What dealers?

Quote:
Originally posted by mfisch
i seriously doubt the dealer will let you pull the ECU - that would be too easy, but they may have liability/warranty issues.

hatchy is offline   Reply With Quote
Old 07-31-2003, 09:08 PM   #157
Burke
Scooby Newbie
 
Member#: 38939
Join Date: Jun 2003
Vehicle:
2004 STI
Black w/ Gold Rims

Default drag

Well, I did have to start the car and for that I reved to 4k dumped the clutch which dropped the revs to 2.5-3k then it was WOT all the way up to 7K. So I am hoping that means I have not seen the det problem yet. I am worried that someone else here was smooth as glass then at 3200 miles started getting det. Weather condition changes maybe?
Burke is offline   Reply With Quote
Old 07-31-2003, 09:38 PM   #158
markpaco
Scooby Newbie
 
Member#: 33743
Join Date: Mar 2003
Location: Hawaii
Vehicle:
2004 Impreza WRX STi
WRB/Silver

Default Got mine back

I just got mine back and I drove it hard through the lower gears at WOT to redline with no pinging. I even tried loading the car more by running the A/C at the same time (although it cuts it out at WOT).

The service was pretty quick. I dropped it off on Monday afternoon and the ECU was mailed out on Tuesday. I assume they got it back today, reinstalled it, test drove it, and then I picked it up this afternoon. I didn't feel any noticable power loss but suspect that there is one.
markpaco is offline   Reply With Quote
Old 07-31-2003, 09:44 PM   #159
RichQY
Scooby Specialist
 
Member#: 31948
Join Date: Jan 2003
Location: SoCal
Vehicle:
2004 STi
Aspen White

Default

Quote:
Originally posted by STiBro


So it sounds like you did a WOT blast on the car, without a break-in? You're motor will not last. You're supposed to Grand-Ma it for the first 1K miles!
NO wot. i posted in another thread. it was 98 outside

i was going up a hill on 3rd, very moderate throttle position in 3 rd gear running just a tick over 3000 rpm.


i guess my dealer filled up w/ piss gas.. i told them not to..

those cheap bastards
RichQY is offline   Reply With Quote
Old 07-31-2003, 11:44 PM   #160
happasaiyan
Scooby Specialist
 
Member#: 37731
Join Date: Jun 2003
Chapter/Region: MWSOC
Location: Rolling Meadows, IL
Default

Quote:
Originally posted by STiBro

you did a WOT blast on the car, without a break-in? You're motor will not last.
please dont spew vomit all over this thread. or board for that matter.
happasaiyan is online now   Reply With Quote
Old 08-01-2003, 12:06 AM   #161
ERIC DRAVEN
Scooby Newbie
 
Member#: 37520
Join Date: May 2003
Location: CALIFORNIA
Default

does anyone know about a reflash for CA?my dealer said soa is still working on it.
ERIC DRAVEN is offline   Reply With Quote
Old 08-01-2003, 12:27 AM   #162
mfisch
Scooby Newbie
 
Member#: 28591
Join Date: Nov 2002
Default

Quote:
Originally posted by hatchy


How did you guys get on the list? What dealers?

if you get repeatability on the det (nail it out of the hole, and you hear that light krinkly, rattly, ppprrrrriiinkkkk comin' up on 5K) just run it down to the nearest subie dealer and tell them you are getting detonation when you nail it coming out of the hole - so to speak.

they'll want to run it for themselves (can you blame them - it's an sti). if you have repeatability this should not be an issue. the tech (and soa rep) who tested my vehicle even offered to take me along!

the soa rep assured me the det they were hearing was not going to "hurt" the car, but i stated my preference for the new map any way.

the only drag is leaving the car at the dealership - i've been very polite so i hope the car gets indoor storage.

dunno if this is beta code or not though, i've a feeling this map has been around for a while.

-mike
mfisch is offline   Reply With Quote
Old 08-01-2003, 12:02 PM   #163
wolverine
Scooby Newbie
 
Member#: 36571
Join Date: May 2003
Location: NorCal
Vehicle:
2004 WRX STi
Black & gold

Default Re: Re: Re: Lucky

Quote:
Originally posted by Ringboy


This is exactly what I am experiencing. Wolverine, are you having your's reflashed? Can anyone make any comments yet if they have had their's done?
I am going to have mine reflashed... as soon as I use up my full tank of 94! Because I don't have det with 94 (91 mixed w/ 100).
wolverine is offline   Reply With Quote
Old 08-01-2003, 12:17 PM   #164
horshack
Scooby Specialist
 
Member#: 19236
Join Date: May 2002
Vehicle:
Axis GT35/40R STi
Not back yet

Default

If available, can someone please do some before and after dyno charts ?

I cannot find anyone in the Phoenix area that wants to do the reflash, including myself, without more data to support what has changed and the possible performance implications.

Need more data! Will SOA ever lets us know what the reflash does?
horshack is offline   Reply With Quote
Old 08-01-2003, 06:23 PM   #165
mfisch
Scooby Newbie
 
Member#: 28591
Join Date: Nov 2002
Default

you can come down to tucson next week sometime and see how the new map performs on my car if you like.

possible performance implications? they drop timing advance at ~4000... i don't think performace will go up...

i'm getting det on 94 octane also.


heheh, you can wait on cobb i guess, if you want dyno info, etc. and are willing to buy their prom burner & code
mfisch is offline   Reply With Quote
Old 08-02-2003, 05:51 PM   #166
jcnel_wrx2k3
Scooby Newbie
 
Member#: 38268
Join Date: Jun 2003
Location: UT
Vehicle:
2003 WRX
WR Blue

Default would somebody explain.

Hello All,

I'm confused. If detonation is basically the ignition of the fuel/air mixture BEFORE the correct time that the piston needs to move in order to transfer the pressure power (burning air/fuel) to rotational power, isn't detonation (aka pinging) a "power loss" already?

So many claims here is that 'fixing' a detonation problem with the STi will cause a "power loss." Is this true?

Later,

jcnel.
jcnel_wrx2k3 is offline   Reply With Quote
Old 08-02-2003, 06:21 PM   #167
markpaco
Scooby Newbie
 
Member#: 33743
Join Date: Mar 2003
Location: Hawaii
Vehicle:
2004 Impreza WRX STi
WRB/Silver

Default

Just because the spark plug fires does not mean that peak pressure occurs instantaneously. Because there is a delay in the combustion depending on the pressure, spark intensity, fuel ratio, and turbulence in the cylinder at different rpms, the computer must compensate by adjusting the timing. Ideally, you want to have peak pressure at or near TDC so that you can utilize all the energy on the power stroke. Since the timing will not be advanced as far as Subaru originally intended with the reflash, the peak cylinder pressure may be slightly after TDC which results in a power loss compared to a slightly more advanced timing setting.
markpaco is offline   Reply With Quote
Old 08-02-2003, 06:42 PM   #168
jcnel_wrx2k3
Scooby Newbie
 
Member#: 38268
Join Date: Jun 2003
Location: UT
Vehicle:
2003 WRX
WR Blue

Default hmmm...i understand a little better.

All of the evidence I've seen about pinging, detonation and such is that the energy to actually make the 'ping' is "lost" in stressing out engine internals. One really good detonation will actually blow the tops off of the motor, melt pistons, or cause extra and eventually dibilitating stress on crank bearings.

Therefore, isn't pinging 'still' a power loss, because the power in the fuel/air mixture is ending up someplace else, rather than turning your crankshaft?

So...if Subaru has this fix, could there be a chance of a better power result at the rpm range in question?

Cheers,

jcnel.
jcnel_wrx2k3 is offline   Reply With Quote
Old 08-02-2003, 08:46 PM   #169
horshack
Scooby Specialist
 
Member#: 19236
Join Date: May 2002
Vehicle:
Axis GT35/40R STi
Not back yet

Default

Quote:
Originally posted by mfisch
you can come down to tucson next week sometime and see how the new map performs on my car if you like.

Have you already dropped off your car for the ECU shipment?

If not, and your willing, let me know I would like to set up some Dyno time (before and after reflash) to gauge the results.

I Would be willing to foot half the bill for Dyno time.
horshack is offline   Reply With Quote
Old 08-04-2003, 12:34 PM   #170
dlowman
Scooby Specialist
 
Member#: 22998
Join Date: Aug 2002
Vehicle:
2004 WRX STi
GT35R 572 whp 93/meth

Default

Well I got my ECU reflshed and my car back today. I do not notice any horsepower loss. I haven't driven the car since thursday. It does feel slightly different but I can't put my finger on it. The butt dyno is making me think there may be a little more power on the top end. I certainly do not think it has lost any power. The car should be more consistant now anyway. I would say its definately a thing you should do.
dlowman is offline   Reply With Quote
Old 08-04-2003, 04:40 PM   #171
RichQY
Scooby Specialist
 
Member#: 31948
Join Date: Jan 2003
Location: SoCal
Vehicle:
2004 STi
Aspen White

Default

Quote:
Originally posted by dlowman
Well I got my ECU reflshed and my car back today. I do not notice any horsepower loss. I haven't driven the car since thursday. It does feel slightly different but I can't put my finger on it. The butt dyno is making me think there may be a little more power on the top end. I certainly do not think it has lost any power. The car should be more consistant now anyway. I would say its definately a thing you should do.
thx man.

i ll get on it once my car has finished break in.

this det problem is actually helping me keeping the rev limited

RichQY is offline   Reply With Quote
Old 08-04-2003, 07:03 PM   #172
orthojoe
Scooby Newbie
 
Member#: 37237
Join Date: May 2003
Location: Michigan
Vehicle:
2004 Impreza WRX STi
Black

Default

hey, does anybody with insider info know exactly what the reflash does? sparks? I turned in my STi today to get the reflash, hopefully it'll fix the problem, but I'd like to know what it does.

orthojoe
orthojoe is offline   Reply With Quote
Old 08-05-2003, 09:46 AM   #173
Porter
NASIOC Supporter
 
Member#: 486
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Roanoke, VA
Vehicle:
2004 Forester XT
bug spattered

Default

We've now had 2 vehicles flashed and back on the road. The first one was a 4 business day turnaround, the second was a 2 business day turnaround. The customer (dlowman) dropped the vehicle off on Thursday and we had him back up and running on Monday.

I'll defer to the owners for reports on performance and presence of ping.

The key to all of this is that the cars were already listed in Subaru's system because we had filed the paperwork properly with Subaru in order to start the process. This is not going to be a situation where you go into the dealer for the first time and they flash it and give it back to you. Here are the steps:

1) If you have ping, make an appointment when you can spend about an hour at the dealership.
2) You must get a Subaru Certified technician to ride along with you and they *must* be able to hear the ping. Therefore, your problem *has* to be reproducible.
3) Once the ping is 100% verified, then the service department can take action, typically by filing a QMR so you have a case number that is actionable. The service department will probably have to have input and approval from their regional rep before they can proceed.
4) Assuming everything else has been done and Subaru has approved the reflash, you will need to make an appointment to drop your vehicle off with the dealer while the ECM is sent for reflash. It's highly unlikely that this will happen the same day as the ping verification, so don't expect an immediate fix.
5) Drop your vehicle off, get your loaner, and come back when the dealer notifies you that everything has been completed and the vehicle checks out OK.
Porter is offline   Reply With Quote
Old 08-05-2003, 02:14 PM   #174
Corkfish
Scooby Specialist
 
Member#: 39503
Join Date: Jul 2003
Default

I have a Forester XT and have noticed that there is an occasional pinging when I accelerate very hard. Since the engine is similar to the STI, I wonder if you'll see this problem occuring with the XT as well.
Corkfish is offline   Reply With Quote
Old 08-05-2003, 02:45 PM   #175
wolverine
Scooby Newbie
 
Member#: 36571
Join Date: May 2003
Location: NorCal
Vehicle:
2004 WRX STi
Black & gold

Default

Quote:
Originally posted by Corkfish
I have a Forester XT and have noticed that there is an occasional pinging when I accelerate very hard. Since the engine is similar to the STI, I wonder if you'll see this problem occuring with the XT as well.
Is it quite audible? How long does it last? On the STi, it is 1-2 secs. Also, what gas are you using? Is there an rpm range this occurs in? Without more info, we can't really tell...
wolverine 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
AccessPort v2.0 Update Released mike91401 South West Impreza Club Forum -- SWIC 10 02-08-2007 05:30 PM
04 STi ECU reflash confirmed (ping fix)??? stealitall Engine Management & Tuning 10 12-12-2006 06:04 PM
WTB 02-03 STi I/C splitter and STi Aspen white hood scoop.Also need 04 STi ecm Hondaslayer Private 'Wanted' Classifieds 8 07-30-2005 10:58 PM
Anyone local have an STi ecm lying around? Hondaslayer Mid West Subaru Owners Club Forum -- MWSOC 3 04-01-2005 10:14 PM
Question for USDM STI ECM experts NMLegacy Subaru Conversions 3 11-16-2004 08:57 PM


All times are GMT -4. The time now is 08:39 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.