Welcome to the North American Subaru Impreza Owners Club Sunday May 3, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
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.
Thread Tools Display Modes
Old 07-24-2007, 11:49 AM   #1
Scooby Newbie
Member#: 154839
Join Date: Jul 2007
Default Need Help on swapping engines

Dear members,

Hope all is well…I need help on my project

I have a 1999 Subaru legacy with an engine (EJ25 GX A/T) and recently bought a (EJ20 TT M/T) and am working on swapping engines. I had no Technical problems until I reached the electrical part where I am very lost.

The problem that I am facing is that the old engine has an ecu W9 (w9--22611AG120--A18000D2A--9Y19) and the new one has an ecu Y9 (Y9--22611AG302--A18000D3U--0Y14). The electrical circuit in the car has a different plug that connects the old ecu W9 then the new ecu Y9. I don’t want to change the whole circuit because several reasons for example:

1) The old circuit that I have on it is for a left seated car where the driver seat is on the left seat and the new circuit is for a right seated car where the driver seat is on the right.
2) The old circuit that I have on it is for full automatic options (ex: Air condition is automated) and the new circuit is not for a full automatic.

So what happened was when I changed the old circuit to the new one a lot of functions in the car didn’t work a small example the head lights did not work along with a lot of other functions….

I need help on how to modify the wires from the old circuit or ecu to work with the new ecu with the full functions working. I have an idea on how to do that but just don’t know which wires are which. Do I need to find a Circuit Diagram? If so, how do I find it where I have been looking every where with no results?

What should I do to solve this problem??? Please advice where I can't wait to finish the project and enjoy the extra power!!!

I hope I made the problem clear…If not please ask me to explain more!!!
* Registered users of the site do not see these ads.
amr_old is offline   Reply With Quote
Old 07-25-2007, 02:42 PM   #2
Scooby Specialist
Member#: 97642
Join Date: Oct 2005
Chapter/Region: SWIC
Location: Phoenix, AZ
2002 Wrx Sedan


Your best bet is to buy a standalone to run the motor and leave the old wiring/ecu for everything else.
Smoby is offline   Reply With Quote

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
Need help on swapped gf8, anyone near Savannah want to do some work for compensation? ProjectL South East Region Forum 4 01-07-2010 09:20 AM
Need Help on swapping engines amr_old Subaru Conversions 3 07-24-2007 05:50 PM
Need Help on swapping engines amr_old Electrical & Lighting 1 07-24-2007 12:49 PM
PLEASE HELP! Need help on 97 Leg. Engine Swap FastBlackLegacy Subaru Conversions 2 03-18-2005 04:38 PM
need help on swap wrx engine T-240Z Subaru Conversions 9 11-03-2003 12:36 AM

All times are GMT -4. The time now is 06:27 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.