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rustfreenz

E30 M40 to M42 Engine swap wiring help

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Hi all,

Just trying to get started on my m40 to m42 engine swap. however, I cant find a definitive wiring diagram for the M42 - i have the loom, i just dont know exactly which wires are for what. if i knew this it would be much easier. cheers.

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Check out this site.  I think you wlll find a lot of useful info there.  The page linked below is for ECU pin outs, but there are many pages of info on wiring colour codes and connectors etc...

http://www.e30zone.net/e30zonewiki/index.php/ECU_Pinouts

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