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Old 30th April 2017, 10:36
mcramsay mcramsay is offline
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What scares me even more is I'm running with a fault code that sets a 5500 rpm Rev limit on the engine! I havnt got round to addressing the issue yet which is basically the mss50 ( m3 ecu) requires a vehicle speed input in the m3 this signal comes from the diff speed sensor as an analogue signal, then goes into the dash clocks and comes out as a digital signal which goes to the ecu.

Basically the Rev limit is there to stop you going over 155 mph. So by lowering the Rev limit to 5500 there's no way you could reach that speed in the higher gears.

There are boxes on sale to replicate the signal if you are using non standard clocks but they are around 400! I did read up and find you can splice into the car sensor which has the correct output!
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