Successful USDM Evo 8 ECU swap into Evo 6 TME

[gobbles]

Special thanks to Cossie, BarryC, and Todd-W for helping me through the swap. Here are the details.

First, compare the USDM Evo 8 pinout to the Evo 6 TME:






Based on the pinout comparison, the follow harness changes are necessary:

Swap pins 8 and 22
Connect 31 from the ECU to 34 on the vehicle harness
Connect 31 from the ECU to 20 on the vehicle harness
Connect 32 from the ECU to 21 on the vehicle harness
Disconnect pin 87

I used a patch harness to make the changes and not have to cut the actual vehicle harness. All connections were soldered and then protected with heat shrink tubing. Any flying leads remaining were folded over and shrink tubed as well. Here are pictures of the work:







Once the harness was finished, I needed the proper ROM for the ECU. BarryC provided a JDM Evo 8 GSR ROM file and xml definitions with the rear O2, EGR, and immobilizer disabled. The file is attached.

My TME fired up right away, and has thrown no codes. I took it immediately over to our emissions station, where it passed their ODBII check. (The emissions test started me down this path in the first place. The Evo 6 TME ECU would not talk to the emission station computer via the OBDII port.)

Very happy to have the swap complete, and can't wait to start logging and tuning.

Thanks again,
Tim

[MD]

great to know
thanks

i'm busy for my evo6 tme engine to put a evo7 ecu on it.
the 8 is also a option.

[gremlin]

are you sure about your wiring?


Connect 31 from the ECU to 34 on the vehicle harness
Connect 31 from the ECU to 20 on the vehicle harness
Connect 32 from the ECU to 21 on the vehicle harness

pin 31 on both evo6 and evo8 ecu is blank
i think you meant 32 & 34 piggyback with 20 & 21 for the rad. fan.

whats 31 to 34 going to do?

attempting this exact job now so any extra info would be great

cheers

[cossie1]

are you sure about your wiring?


Connect 31 from the ECU to 34 on the vehicle harness
Connect 31 from the ECU to 20 on the vehicle harness
Connect 32 from the ECU to 21 on the vehicle harness

pin 31 on both evo6 and evo8 ecu is blank
i think you meant 32 & 34 piggyback with 20 & 21 for the rad. fan.

whats 31 to 34 going to do?

attempting this exact job now so any extra info would be great

cheers

evo 8 usdm ecu has a different pinout to an evo 6 and evo 8 260 ecu

[gremlin]

cossie mate, i need your help then!!

here i am following evo8 260 wiring instructions to put a usdm evo8 ecu into my bro's evo6! no wonder its not going well!! the car wont idle and the fans ran constantly..

so can you confirm the above is 100% correct for fitting a usdm evo8 ecu into an evo8 gsr?

cheers mate

[cossie1]

cossie mate, i need your help then!!

here i am following evo8 260 wiring instructions to put a usdm evo8 ecu into my bro's evo6! no wonder its not going well!! the car wont idle and the fans ran constantly..

so can you confirm the above is 100% correct for fitting a usdm evo8 ecu into an evo8 gsr?

cheers mate

Yes the above is the correct wiring for fitting a usdm 8 ecu into an evo 6

It was me that helped gobbles get the fans working correctly on his car.

I belive you will also need to use an evo 8 rom (the Ralliart Rom posted in the 1st post) to get the car to run correctly.

[gremlin]

thanks heaps mate.. ill give the above wiring ago..

i presume its just a standard evo8 gsr ralliart rom? id: 97250001 ?. .there has been no mods to this one to make it run on an evo6 has there?

im running 97250001 on my evo8 gsr so ive got a copy of that rom ready to go if its just the standard un mod'd one..

[cossie1]

The above rom, has the immobiliser code disabled, egr system disabled too, to stop cel's being thrown up

[C6ect.ect]

Looks like most of the shielded twisted pairs use same connector numbers. That could turn into alot of extra work.

[wreck'd]

The instructions are correct there with regards to the wiring. The US8 and 8 260 have the same condenser fan pinouts. No need to take a wire from 31 to 34.

[w2j]

gobbles are you able to use the launch limitter?

[Zakie@TIC]

Is there a way to disable the 2nd O2 sensor totally off the map ?

[MD]

1 more thing i have a evo8 ecu here and whant to put it in to my evo6 but the ecu has 3 blocks and the 6 has 4 blocks for in the ecu.

[The WARLOCK]

1 more thing i have a evo8 ecu here and whant to put it in to my evo6 but the ecu has 3 blocks and the 6 has 4 blocks for in the ecu.

You have a JDM evo8 ecu and not a euro one ,jdm has 3 plugs and a euro or evo7 4plugs

[MD]

ooooo
oke
thanks