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Old 06-22-2010, 04:17 PM   #1
Scooby Newbie
Member#: 249934
Join Date: Jun 2010
Default 1997 Subaru Impreza Outback 2.2L to 2000 Subaru Legacy Outback 2.5 swap


We are trying to swap a 1997 2.2L Impreza 5-speed to a 2000 Subaru Legacy 2.5L which was also a 5-speed. I am reading that the wiring harness changes after 1999, is this a huge deal or is the swap still possible? Can the 2.2L ECU run the 2.5 the way that it can run the Impreza 2.5RS motor?

Thanks very much ahead of time,

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Old 06-27-2010, 10:21 PM   #2
Scooby Specialist
Member#: 47746
Join Date: Nov 2003
Location: east stroudsburg PA
2000 Impreza 2.5 RS


the 2.2 ecu can run the 2.5 but the IAC harness plug does not match.....i have this done to my impreza and it idles at a constant 1.5k rpms
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Old 06-30-2010, 11:24 AM   #3
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Member#: 247223
Join Date: May 2010
Chapter/Region: MWSOC
Location: b-town
97 impreza OBS
aspen white


i also have a 97 impreza OBS 2.2 and im strongly thinking about doing this. let me know of how many big problems you ran into and how much the total swap cost you.
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