Are These Ecus Interchangeable.

[Peanut92]

So my nistune didn't arrive going to send my current ecu off. It's a daily car so I can't go without one.

This is my other spare I have it was out of my r31 running a rb20 silver top out of a 32 I assume can you tell me if there's a difference bottom right number is different

Ecu in car

Spare ecu

[Peanut92]

Also is this an idle screw or diagnostics screw ?

[iruvyouskyrine]

They are the same ecu really no difference. Will work fine. And that is an idle adjustment screw, to be used in conjunction with the IACV adjustment.

[Peanut92]

How do I do a diagnostics I searched the forums can't find a write up

[GTSBoy]

The screw is also used to enter diagnostic mode. Notwithstanding that, it is far far better to use a Consult reader or generic scan tool anyway. Seeing as you need a USB Consult cable to use Nistune anyway, that's what you should do.