JDM ECU? or USDM ECU? I NEED HELP!
 

I'm currently installing a JDM EJ20 into my 2005 Subaru WRX.

My question is...Do I need to buy a JDM ECU? Or can I use the USDM ECU? If I do end up with the JDM ECU will it work with the harness and other assessories?

I need some gurus!

[nomedia="http://www.flickr.com/photos/lokdown00/8698272145/"]DSCN9991 | Flickr - Photo Sharing![/nomedia]
[nomedia="http://www.flickr.com/photos/lokdown00/8698272145/"]DSCN9991 | Flickr - Photo Sharing![/nomedia] by [url=http://www.flickr.com/people/lokdown00/]Lokdown00[/url], on Flickr
:sign0085:

If you want to pass smog you'll need a USDM ECU.

The car will be registered in PA so I don't have to worry about smog :)

If you want the AVCS to work youll need the JDM ECU

He can splice in the avcs wires ;)

Iag performance I believe sells a premade one.

JDM ECU if your engine has AVCS.

-- Ed

[QUOTE="MonsterGC;3392914"]He can splice in the avcs wires ;)

Iag performance I believe sells a premade one.[/QUOTE]

It's a chick lol. So. She.


Now awaiting for leg humpers.



Use the jdm ecu as I said on Facebook.

[QUOTE=Heedz;3392961]
Now awaiting for leg humpers.


[/QUOTE]

:giggity:


You called?

[QUOTE="joltdudeuc;3392969"]

:giggity:

You called?[/QUOTE]

Called?

JDM ECU is your only choice for AVCS.

Thanks guys and lmao heedz I didn't want them to know!

Which EJ20 are you putting in? EJ207 V7/V8?

-- Ed

If you need to "get by" the WRX ECU will run the engine, but as mentioned you really want the JDM ECU.

In my case, AVCS not working = 14psi @ 3900 RPM
AVCS working & tuned for = 14psi @ 3200 RPM

Needless to say, that makes a huge difference in drivability.

[QUOTE=Concillian;3393024]If you need to "get by" the WRX ECU will run the engine, but as mentioned you really want the JDM ECU.

In my case, AVCS not working = 14psi @ 3900 RPM
AVCS working & tuned for = 14psi @ 3200 RPM

Needless to say, that makes a huge difference in drivability.[/QUOTE]

Yep. And its not only spool, but even off boost response and drivability.

-- Ed

I can confirm this running an EJ257 long block without AVCS (all the sensors and feeds are there, just don't have the ECU, harness, pedals, or IM/TB). Driveability sucks.