| As Mike says if its running the ECU can't be naff as for repairing them I should think thats a possibility, same ECU as used on Cosworths and a few other vehicles(Renault 21s I think,although these ones are not identical they can still be a source of spares).
Maybe yors just needs setting up properly, TPS abd CO2 settings.
As for using the 16m.A0 (single injector) or the 16M.B1 (twin injector) ECU will mainly depend on the signal from the engine position sensor reading off the flywheel, both these ECUs are from bikes with a single engine sensor where as the P8 bikes use two sesnors to allow the firing of the injectors to be more accurately controled.
If the signal is compatiable then getting hold of the injection part of the harness off the 16M setups would help and probbaly the Rev counter as I know one from a 916 witha 16M ECU doesn't work on a SPS with a P8 ECU
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