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Welcome to the Evo ECU Wiki!

The Evo has a powerful stock Engine control unit (ECU) which can be reprogrammed to accommodate the needs of each individual car based on their modifications and desired outcomes.

This wiki has the goal of detailing, with community contributions, how to tune, patch, and log your stock ECU, but it isn't the only resource available to you; please see our helpful links page for other sites that provide useful information.

But wait, there's more! We also have mirrors set up for a variety of software packages, documentation, and other bits and pieces that folks find useful in our mirror section. If you're looking for an obscure ROM version, an old version of EcuFlash, or some other odd bit of software, there's a good chance we might have a copy of it here.

Note to editors: if you're planning on adding a new page to the wiki, thank you for the help! But please, make sure you check to see if it doesn't already exist first. For example, we already have pages on EvoScan, EcuFlash, Logging Cable, Wide Band Air Fuel Meter, and a Glossary. If the page you were going to add is already covered by an existing page, please help us improve by augmenting and cleaning up the existing articles. Thanks!


Warning.gif
WARNING! Tuning or patching the ECU can be VERY DANGEROUS. If you are not careful you can destroy your ECU or worse, your engine. If you enter a value incorrectly or tune the engine improperly you seriously risk your engine's health. Proceed with caution and ALWAYS DOUBLE CHECK any changes you make.


Glossary

Throughout the pages of this wiki many acronyms are used, if you have an confusion over any terms please visit the Glossary.

There are also many tables that are specifically referred to in ECUFlash that may not necessarily make sense to you. Please visit the ECUFlash Specific Glossary for an explanation of what these tables do.

Tuning

Tuning is the name for the process whereby you alter the fuel, ignition, boost, and other variables to influence how the ECU controls the car.

Patching

Patching is the new name given to modifying the code of the ROM. Through ROM modification various features of the stock ECU can either be improved or entirely new features can be created.

Logging

The term Logging refers to obtaining and recording data from the ECU to be used for tuning purposes.

Downloads

All files can be found in the Downloads section

Development

If you're interested in ECU communications, disassembly, patching, etc., please see our ECU Development page.