ECU Firmware

All bundled software for the ExtraEFI ECU's can be found here. If you need something and you can't locate it, feel free to contact me using the button in the support section above.

If you are unsure of what you need, start with a CD for MS1, MS2 or MS3! (Please note: This is supplied on a CD with each ECU)

Code History

Up to Feb 2012 "V2.1.0p" for normal batch fired ECUs or "V3.003T" for semi-seq

Between Feb 2012 to Feb 2014 use "Release V3.2.1" for ALL MS2 ECUs

Between March 2014 and Oct 2014 use Release V3.3.1a for MS2 ECUs

Between Nov 2014 and May 2015 use "Release V3.3.3" for all MS2 ECUs

From June 2015 use "Release V3.4.0" for all MS2 ECUs

• Basic EFI Explained
• ExtraEFI Manuals
• Essential Setup Instructions
• Ignition Setup Instructions
• Problem and Cures