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Old 05-21-2020, 12:19 PM   #1
grdprx
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Default EJ22 MAP engine into MAF Impreza

I have a 1999 Impreza OBS, engine has a rod knock. I got a replacement EJ22 phase 2 engine that upon closer inspection is MAP based, my car is a MAF setup. Can I swap the intake manifolds to rectify this? Are there any sensors on the block related to MAP/MAF?
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Old 05-21-2020, 01:01 PM   #2
Muffin15
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Yes, you will want to retain the sensor setup that is original to your ECU and swapping the intake should be just fine. I have heard of some needing to have the cam or crank pulley's swapped over so the ECU gets the correct signal but am not sure what motors require that
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Old 05-21-2020, 03:33 PM   #3
grdprx
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Sweet, thank you for the reply!
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Old 05-22-2020, 11:38 PM   #4
Leonardo
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Ok, I have done this swap on my OBS.

Use the long block. Bring over your Cam and crank timing belt gears and swap over your whole intake, sensors and all.

I got the point I can swap these out in less than a day.

EDIT: my 1999 OBS is MAP (EJ222) Is yours an EJ223? It's all the same as I wrote above but just wondering the difference.
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Old 05-24-2020, 10:41 PM   #5
grdprx
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Quote:
Originally Posted by Leonardo View Post
Ok, I have done this swap on my OBS.

Use the long block. Bring over your Cam and crank timing belt gears and swap over your whole intake, sensors and all.

I got the point I can swap these out in less than a day.

EDIT: my 1999 OBS is MAP (EJ222) Is yours an EJ223? It's all the same as I wrote above but just wondering the difference.
Thank you! I wouldnít have thought to have changed out the timing cams from old EJ22 to the new EJ22. Yes, mine is engine code EJ223
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Old 05-27-2020, 08:09 PM   #6
Leonardo
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You are welcome!

Change cam timing gear and should be fine. Let me know when you get it running.
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