Replacing a 2G Euro ECU with a 1G ECU

[Conqeror]

Hi,
I have a Mitsubishi Eclipse 2G Euro and I have an ECU for 3 cubes (normally I know it is for 4). Is it possible to connect the ECU with 1G?

The engine is 4g63 and has a camshaft position sensor on the camshaft sprocket.

 

[steve]

Almost anything is possible but in this case it's not optimal because there are several things used on a 2G that the 1G ECU doesn't support. It's far easier to source a 2G ECU.

 

[Conqeror]

I thought this was a temporary option and that somehow it would work.

Well, I have such an ECU for 4 cubes (photos). However, I do not have the keys for them, is it possible to get around the Immobilizer?

Even if you could bypass the immobilizer, you would definitely have to convert the installation to 4 ECU cubes. And here a diagram would come in handy ...

Does anyone have a schematic for my 3 cube computer?

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[DSMPT]

If you are thinking to use a 1G 3 plug ECU as PnP, then you can't connect as PnP. The shape of those 3 plugs for ECU are totally different. I could be wrong but if my memory serves me well, EDM 2G 3 plug ECU's plugs are the same as the early EVO or RVR HSG/SSG. So you may be able to "connect" those ECU as PnP, but I believe it would require some works (includes tuning) to make it functioned since there are some differences.