zc motor swap
i bought two ecu one is suppose to be out of a 89 si civic hb the # is 37820-PM6-L080621-205734 9m and the other is a 91 4door civic ex ecu # is 37820-PS9-A50650-314365 zc which ecu would work for jdm zc dohc motor swap
pm7 is the jdm ZC ecu
pg7 is the 86-91 integra
pm6 is the 88-91 si
The difference between them are the rev limits among others. They are listed in order to which are best. I am not sure what the PS9 is, I would guess a obd1 ecu.
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