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Old 10-03-2010, 09:16 PM   #1
slizanbro
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Member#: 158899
Join Date: Sep 2007
Chapter/Region: MWSOC
Location: BFE Indiana
Vehicle:
2000 OBS swapped
two tone

Default harness questions

Ok, I have looked and cannot seem to locate this exact info. I have a 98 Legacy gt with the 2.5 dohc engine. Bottom is shot. I got a killer deal from a member on here for a same year 2.2 sohc engine with ecu. My question is will my harness work with the 2.2 and the 2.2 ecu.
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Old 10-03-2010, 10:57 PM   #2
Storm
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Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
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96L Most Over-
Developed Beater

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According to my FSM, the wiring diagram shows the same schematic for both the EJ22 and EJ25. The pin voltage chart shows the EJ25 having pin #35 assigned for the vent control solenoid and the EJ22 calls it a drain valve. They probably do the same thing. If not, you'll have a CEL for it.

The EGR control valve goes to pin #71 on the EJ25 ECU, but it's not used on the EJ22.

I'm 99.9% sure the EJ22 will run with no codes by simply removing the EJ25 ECU and plugging in the EJ22 unit. The engine harness uses the same shape plugs, so you won't need to change anything there.

The exhaust manifold will be singleport, and different than the EJ25 manifold....you'll need to source one if you don't already have it.


Jay
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Old 10-04-2010, 11:41 PM   #3
slizanbro
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2000 OBS swapped
two tone

Default

thanks for the info. I am searching for a single port as we speak. I appreciate the help.
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Old 10-06-2010, 11:44 PM   #4
subarumafia700
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Chapter/Region: NESIC
Location: North Ferrisberg, Vermont
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1998 Impreza Sedan
Dark Green

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heres another thought...
look at the intake manifold bolt pattern.. if its the same, just us the dohc manifold on the 2.2l, we have done this a number of times at the shop i work at. car runs like a champ and redlines higher i think.. the 2.2 is like a small block.. you can throw rpms and redlines at it all day long and its not going to complain.
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