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Old 09-06-2012, 12:50 AM
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Question Remove EWS / O2 sensor for motor swap

Does anyone know what I need to edit in the ECU to remove EWS and the secondary O2 sensors when I'm doing motor swaps? In particular for MSS52 MSS50 MSS41 MSS42 MSS43 ECUs. These are going into E30s and E28s. I have winOLS, free version, and MPPS. Any help / guidance / point in the right direction would be awesome!


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Old 09-06-2012, 12:54 AM
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I'm looking at buying a GT1, just to have for diagnostics, so if the GT1 may have some options in it I can buy it sooner.
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Old 09-06-2012, 02:01 PM
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Secondary lambdas should be able to be removed on all of those, MSS50 came without. In a few cases, the option is there to find a software version for a Car without the secondary lambdas and program the ECU to that spec.
The US MS41.1 uses a different hardware/ECU type to the euro version, but I don't see any reason why you couldn't get a euro ECU, delete the EWS and that will be secondary O2 free. You would get rin of any air injection, tank leakage detection etc, but it would also disable the basic OBD2 fault code readers.

EWS off possible on MSS50 and MS41, and I believe MSS52/54.
I haven't seen it removed on MS42 or 43 yet, so you'll want to carry over the EWS box and key chip.
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