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Driveline, Engine & DME Tuning
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Old 08-19-2019, 02:49 PM   #1
Nisnos
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Join Date: Sep 2016
Location: Uk
Posts: 30
My Ride: Z4
Alternator gurus!! Help!!

Hi everyone

I have an issue on the ms45 to ms43 conversion.
I'm using the ms45 alternator and have to get the engine to 2300-2500 rpm before the alternator starts to charge.
I think it's a default failsafe setting.

If I just use the ms43 voltage reg nothing charges at all unless I feed it a switched 12v to both pins( as well as the thick main 12v) Then I get a working charge.

However if I do this I get lots of sensor error codes.

I'm hoping to find a solution that doesn't require changing the whole alternator.

Surely it's the regs job rather than the spinny stuff (com and arm).?

Any help would be great

Thankyou in advance
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