Quote:
Originally Posted by spoonf20c
when you say 02 sims will not work are you referring to the bms fix the op quoted? i wanted to give it a shot because its a much cheaper solution that the akra delete-r
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The BMS unit that is for the N54 motor and the advertised S65 motor is simply a voltage divider circuit with an adjustable potentiometer to vary how much of the voltage is being cut down. You can make one for a few dollars and I can show you how, however it will not work.
Unfortunately, that is not going to work on the S65 motor, as the MSS60 DME looks at more than just the output voltage of the sensor.
The MSS60 is looking for voltages on a completely stock car in the range of 0.35 volts to 0.7 volts. It is also monitoring the latency of this voltage.
The MSD80 MSD81 DME's in the N54 powered cars are strictly looking for a plausible voltage range. On the late 2009+ cars, they tightened this threshold at the factory, and hence the reason BMS released the adjustable version of their "downpipe fix" as their old one which was scaling down the voltage roughly 20% was not sufficient.
The MSS60 DME, if the voltage requirements are not satisfied, we will get the typical code for catalyst inefficiency. If signal speed is not satisfied, we will get a different SES code which can vary from a plethora of codes from signal latency, sensor being stuck, low voltage and etc.
The BMS unit is not an o2 "simulator", it is simply an o2 signal modifier.