Rev built MS2 baro correction not working
#1
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I purchased this ECU and it had a single MAP sensor installed. I replaced the sensor with the dual mapdaddy sensor and ran the wire to JS5 which as far as was the only hardware modification I was required to make.
My understanding that the resistor that is mounted on the mapdaddy on some installs was not to be installed for the MS2+.
Right now I am running it with "initial MAP reading" which where I am located at 5600ft varies between 82-83 kPa and the car runs fine.
The problem is when I switch Baro Correction to "two independent sensors", it constantly reads outside air pressure at 100. I have tried changing upper limit, lower limit and default baro and there has been no changes whatsoever to what MS sees.
I know I fuxored some of the insulation of the surrounding wires, but I made sure to hit them with a dab of hot glue to make sure they would not short on anything, and they are completely free-floating.
![](https://www.miataturbo.net/attachments/megasquirt-18/120509d1407968553-rev-built-ms2-baro-correction-not-working-3.jpg)
My understanding that the resistor that is mounted on the mapdaddy on some installs was not to be installed for the MS2+.
Right now I am running it with "initial MAP reading" which where I am located at 5600ft varies between 82-83 kPa and the car runs fine.
The problem is when I switch Baro Correction to "two independent sensors", it constantly reads outside air pressure at 100. I have tried changing upper limit, lower limit and default baro and there has been no changes whatsoever to what MS sees.
I know I fuxored some of the insulation of the surrounding wires, but I made sure to hit them with a dab of hot glue to make sure they would not short on anything, and they are completely free-floating.
![](https://www.miataturbo.net/attachments/megasquirt-18/120509d1407968553-rev-built-ms2-baro-correction-not-working-3.jpg)
![](https://www.miataturbo.net/attachments/megasquirt-18/120510d1407968553-rev-built-ms2-baro-correction-not-working-1.jpg)
#3
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That's not going to work as both JS4 and JS5 are used internally. The expansion board inside the ECU (version 4.6+) has provision to solder a baro sensor on it.
The catch is that it must be a 1-bar sensor - the MPXH6115A6U.
The catch is that it must be a 1-bar sensor - the MPXH6115A6U.
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