USDM VS JDM ECU's

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WannabeSI

Senior Member
I have a B16a obdII swap and I have the jdm ecu that came with it and a usdm obdII ecu from a 99-00 si what one is better? do you know the differences between them? Let me know Thanks!
 
You could try plugging them in and seeing if there is any difference.In my old 86 si I switched to a edm ecu and it made a difference,so try it.
 
jdm ecu looks for higher ron (octane) than usdm ecu & 99 si is obd2b (last
plug on ecu empty).
 
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