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Thread: 2.0 to 2.3 swap
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Old 04-22-2012, 12:04 AM   #13
fastfocus2005
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Join Date: Jan 2010
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Location: Fowlerville, MI
What I Drive: 2005 Sonic Blue ZX3

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I did this swap in my car and you do have to do the things as stated above....but I did find you only need to change the engine side of the harness for the 2.3 since it has IMTV AND IMRC(tumble flaps). The 2.0 only has IMRC so the 2.0 harness will technically work, but it only has the one connector for the IMRC. The 2.3 harness plugs into the vehicle harness without changes as well as the 2.3 PCM plugs into the original harness in the car so changing the harness that passes through the firewall is unnecessary. The only other thing you will have to do is have your keys reprogramed to the 2.3 PCM or your car will not start.
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