openecu.org

I have read through the forums and picked up a lot of information, but the one thing I couldn't find was a detailed guide how to do this from start to finish.

I have downloaded the ECUFlash software and that looks fairly intuitive.

My question is mostly, other than purchasing the appropriate tuning cable, do I need to modify the ECU to be able to re flash it or can I just go straight into loading the software, copying the factory maps and then saving them, and then jumping straight into altering the maps and re flashing the ecu?

I work with after market EMS systems all the time, but this is a new area for me working within a factory ECU so I am wanting to get all the information I can.

Today I will use my Scanner to get the rom information off the ecu so I can then confirm which definiton maps etc I should be using.

I am afraid Evo 3 (1995-1996) does not have a flashable ECU. It may have an EPROM ECU or in worse case just OTP processor – one time programmable by the factory. If you are lucky and have the EPROM ECU, you can socket it and put the flash memory.

Thanks for the tip time to look at other options

get an evo 8 4 plug ecu with appropriate harness.wire in an obd II port.

get an evo 8 4 plug ecu with appropriate harness.wire in an obd II port.