Motec M4 on lancer evo 4

Hello,

recently I bough MoTeC M4 (S/N 6449).

I want to replace oem ecu with this one but I'm not sure where to start with this.

Does anybody here know where can I buy harness for this purpose or how to make one ? I would prefer doing this without the need of chopping factory loom to fit MoTeC.

Thank you

You would need to make the harness. Perhaps you can purchase a stock harness from a wrecking yard to modify for the M4.

This is a more challenging project than if you started with a much newer ECU (M400 or M130). It requires all the same work, but the tools will be more difficult to use and harder to maintain in the future. I do not recommend it, unless you have a good MoTeC M4 support person in your group of friends.

In case I decide to do it and purchase another stock harness what do you recommend me to do ?

Also what do you mean by tools and how do you mean maintain ?

To make a harness, you get the factory workshop manual with the details of the harness, cut off the stock ECU connector, and wire that directly to the new ECU. Sometimes you will need to add things (like ignitors for the coils, if the OEM ECU had those built in), but generally this is an efficient way to get a harness. NOW ONE ISSUE you might have, does the new ECU support the stock trigger pattern (Crank and Cam) sensors, or do you have to add new triggers (possibly wiring and/or trigger wheels) to work with the ECU.

The M4 is setup using a serial port and the EMP software that requires Microsoft Disk Operating System (DOS). I have an old computer with Windows 95 (and a hardware serial port) that features a "DOS Compatibility Window" that can work with EMP software to communicate with M4, M48 and M8 ECU. Those are the nearly obsolete tools you will need to work with your M4 ECU. It's already hard to keep these computers running, in 5 or 10 years it will be even more difficult.

I have converted two older M4 944 Turbo projects to M1, adding features like Knock Sensing, Traction Control, and far superior boost control. I just think it's a false economy investing in a 30 year old ECU, when I know you will struggle.

It's much nicer to work with the current software tools that run on current supported operating systems, like M1 Tune 1.5, with a fast Ethernet connection and I2 Software for evaluating logged data.