I'm interested in reprogramming a Magneti Marelli Microplex MED604C ECU for the ignition of an uno turbo, but I can't seem to find any documentation on this? I'm new to ECU remapping, and my understanding is that all the resources available relate to post 1996 ECUs using the ISO 9141-2 OBD-2 protocol.
Can anyone give me some help on how to approach this, maybe some documentation or what protocols I need to use to access and reprogram this ECU?
As I noted in the comments, I don't think the ECU is programmable, hence why you can't find anything on the topic online. It can still be "chipped", i.e. removing one or more EPROM's and soldering in a flashed substitute.
Alternatives you could try are either;
a) swapping out the entire ECU with an aftermarket unit, e.g. Diktator, Spitronics, etc or
b) installing a piggyback chip like the UniQ that will intercept signals and change them to fool the ECU.
I don't know if you could get your hands on reasonably priced (or free) software to do the work. You might, but I don't know.
