V5 ECU is totally different plug wise to the 97 model, which is a V4
Not compatible at all

I have a V5 STi ecu myself that I've been wanting to drop in to my 99WRX but when swapping the wires. Do you need a special tool to swap the wires or just pull them out and pop back in ?

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MY06 STi

I knew that.. I was just checking to see if it applied to the 3 yellow pluged ECUs..

My V4 STI Type R has the 3 plug Blue,Grey and black too

I have done an engine swap from my my99 evo2 engine with a my00 sti engine and ecu but the J2 sti ecu won't fire my fuel pump. My original ecu E3 will start and run fine… Any ideas? i used my original wiring harness so i'm assuming i will need to do A5/A6 pin swap but not sure about the fuel pump? Any help appreciated

immobilser module on ecu

yep.. ok?... so what can i do about it? or link me to some info
thanks
I'm sure you guys have been through this a thousand times…sorry. this is my first wrx, you got to start somewhere

Do the same pin swap as required for a 99/00 power FC - Google "WRX Power FC pin swap"

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