Welcome to the North American Subaru Impreza Owners Club Monday July 28, 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 12-22-2002, 09:36 PM   #1
Murray
Scooby Guru
 
Member#: 11312
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: ghettoville, PA
Vehicle:
2009 Gray
Legacy 2.5i

Default 97L- with 2.5RS motor... management question

im in the middle of my swap, putting a 2.5RS motor in my 97L.

i have the 2.5ECU and wire harness, but the harness is not complete..it was cut at the firewall, and i soldered most of it back together, but its still gota a few wires not connected to anything.
i am still waiting on a few diagrams to be faxed to me.
the 2.5 has to wait to go in untill i get a new throw-out bearing, mine is 106,555 miles old, makes abit of noise..well, made noise, now its a paperweight, lol.
anyway, i was thinking about swapping all the sensors and such from my 2.2 onto the 2.5 and running it off the 2.2 ECU, i also have an S-AFC and S-ITC for further control.
what im wondering is will this work and get the same potential out of the motor as with the 2.5 ECU?
any help would be good. thanks

Murray
* Registered users of the site do not see these ads.
Murray is offline   Reply With Quote
Old 12-22-2002, 10:22 PM   #2
yebokmj
Scooby Specialist
 
Member#: 2213
Join Date: Aug 2000
Chapter/Region: South East
Location: Raymond, NH USA
Vehicle:
1995 Impreza w/EJ257
Brilliant Red

Default No problem

You can deffinatly run a 2.5 on a 2.2 ECU. What year engine are you putting in the car? The MY98 2.5 ECU will plug right into the MY97 L ECU harrness. For that matter any DOHC 2.5 ECU will plug right in. So you could pick one of those up at Junk yard if your car is a newer SOHC 2.5 and it will still run the car fine. You may run into a slight problems with swapping over the sensors if the 2.5 is a SOHC engine. I don't believe it has a place on the intake manifold for the mounting of the Idle air control selniod and possibly other sensors. You might be able to swap manifolds between the two engines to solve this problem. If you choose to run it using the 2.2 ECU your best bet would be to add a fuel computer such as the HKS AFR or the Apexi AFC to assist in any differances of fuel maps. The MY97 2.2 engine ususally didn't have EGR so the wireing isn't there but the MY98 ECU is programed for an EGR so unless you wire up the EGR on the new 2.5 you will throw that code. If you have further questions feel free to PM or email me.
Joshua
yebokmj is offline   Reply With Quote
Old 12-23-2002, 02:41 AM   #3
Murray
Scooby Guru
 
Member#: 11312
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: ghettoville, PA
Vehicle:
2009 Gray
Legacy 2.5i

Default

my 2.2 did have EGR, and the new motor is a MY99 SOHC, i have the ECU for it, but the ECU harness is completly differnt.
i also have the S-AFC and S-ITC, i was plannign on getting them tuned after everyhting is installed.
if i can get the needed wire diagrams, i will do a full swap, with ECU and harness, shouldnt take long once the harness is complete..hopefully my soldering is still good*crosses fingers*
im gonna try to plug the sensors into the 2.5 tomorrow, if it comes down to it i will swap intake manifolds or just throttle-bodies, whichever is needed..

i will post what i find tomorrow.

Murray
Murray is offline   Reply With Quote
Old 12-23-2002, 01:48 PM   #4
Murray
Scooby Guru
 
Member#: 11312
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: ghettoville, PA
Vehicle:
2009 Gray
Legacy 2.5i

Default

Progress Update:

well, i was about to swap wire harnesses, but soon found out that wont work at all, so then i decided best thing to do would be swap intake manifolds, that wont work either, the 2.5 manifold is too wide by about 1/2 inch.
now i have all the harnesses labeled and am going to cut both apart to make one..making the fuel injector harnesses fit, the TPS sensor work, and well, just about every other sensor on the motor..the only ones that are the same are the cam, crank, and oil-PSi, the injectors are slightly dif. shaped, but can make it work.
i will let everyone know how it goes later, but for now im off to work.
Murray is offline   Reply With Quote
Old 12-25-2002, 07:58 PM   #5
Geek Guy
Scooby Specialist
 
Member#: 8151
Join Date: Jul 2001
Chapter/Region: South East
Location: Rally Tools LLC
Vehicle:
2002 WRX Rally Car
NASA Rallysport, yo!

Default

This is a pretty tough swap.

I did a '93 EJ18 to '99 EJ25 swap in our rally car. I had to do exactally what you did - cut off the old plugs, solder the new ones on, and then rewire the bulkhead to engine wiring harness as well.

The major issue with this conversion is that all of the documentation to do the swap doesn't exist in one place. I had to comb through about 7 different resources, creating a wiring conversion chart for my swap. All told, it took about 15 hours of prep work, and about 25 hours to do the whole swap.

Once you get everything hooked up and ready, try turning it over. If it doesn't turn over, check these things (in order)

1. Fuel? Check the lines. Turn the key to on, do you hear the fuel pump prime? If not, check that wire on the ECU.

2. Spark? Simple here, stick a screwdriver in one of the sparkplug wires, and put near the coilpack. Turn key. If you're got spark, great! One of the problems I had was the coil pack was kinda flaky, and I had to cut the wires off and solder them directly to the terminals on the pack, since the plug was faulty.

3. Airflow? MAP/MAF. Check those signals.

4. Throttle cable hooked up?

If that doesn't work, then look at more basic stuff... is the ecu plugged in? Getting the correct voltage you expect at various sensors?

If you have any questions, please drop me a line. I'll gladly provide my conversion wiring diagrams if they would help... I don't know if they would or not, but you can see my method.

-Eric

Chief Bodger
Last Ditch Racing
eric@lastditchracing.net
http://www.lastditchracing.net
Geek Guy is offline   Reply With Quote
Old 12-26-2002, 10:02 AM   #6
Murray
Scooby Guru
 
Member#: 11312
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: ghettoville, PA
Vehicle:
2009 Gray
Legacy 2.5i

Default

the only problems i have really run into are the idle air control solenoid..my old sensor was a 3 wire sensor, the 2.5's is a 6 wire sensor..(none of those wires being ground!)
i might try to "fabricate" a custom mounting flange and custom tube-routing to get his to work. for now im going to set the car with a high idle(1K at first)

right now we are actually stuck trying to get the 2.2 headers off hte cat. converter, the exhaust is still hanging on the car, so i think im gonna remove it and try once its on the ground. i tried heating hte bolts, every type of penetrating oil, im about ready to grind the nuts off!

oh, i didnt do a full ECU swap, i am running this off the 2.2 ECU and wire harness, the only things i had to cut was just before the sensors(fuel injectors, C.T.S. etc...)
Murray is offline   Reply With Quote
Old 03-06-2006, 09:56 PM   #7
Rally_wgn
Scooby Specialist
 
Member#: 62629
Join Date: May 2004
Chapter/Region: MAIC
Location: Richmond,VA
Vehicle:
1996 OBS in Green
2.5 N/A w/ full exhaust

Default

CLEAR!!!! Bzzzttt! Beep....Beep....Beep.... It's alive the thread is alive again.

Hi Murray, I am helping friend research his pending 2.5L swap (he's on dialup) and noticed this thread from one of the FAQs. He has a '97L wagon and is looking to put a Phase II 2.5L in it (dont know what year yet). I noticed on your last post you just ran this off of your stock ECU and harness. Can you clarify what you did to make this work.
Rally_wgn 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
Wtb: 2000 2.5rs motor or wrx motor xionide NWIC Private Classifieds 2 08-15-2009 05:39 PM
WTB FL 2.2l or 2.5rs motor subienewb29 Private 'Wanted' Classifieds 11 08-10-2008 01:39 PM
N/A 2.5rs motor build, pistons question brian3676 Built Motor Discussion 7 04-14-2008 02:06 AM
Playing with ideas. Anyone have an 00 or 01 2.5rs motor for sale with < 100k on it? AcquaCow Mid Atlantic Impreza Club -- MAIC 35 06-30-2005 10:36 PM
Plz help with 2.5rs tuning questions Mariuslt Normally Aspirated Powertrain 36 02-24-2004 09:41 PM


All times are GMT -4. The time now is 12:35 AM.


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.