Hi, I tried searching for the answers but no luck so if someone can help me clear a few things out.

My car is a 2003 Evo8 JDM RHD.

Is it possible to download the ROM from a Ralliart ECU and upload the file to the Stock ECU? If yes, then would the Stock ECU become the EXACT same as the Ralliart ECU in ALL functionalities?

Hope that made sense

 

Anyone ??? ..... ???

 

I did flashed RAE7 to my e7jdm, CEL is on due to the missing rear o2 sensor. I flash back the stock map thereafter.

 

Did you had the Ralliart ECU or just the flash ROM from the ECU? Asking because if I plug in the actual Ralliart ECU I get no CEL .... so any reason why I should get any CEL if I use it's ROM to flash the stock ECU ???