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Old 03-30-2014, 04:14 PM   #1
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Default MS2E AFR Table not saving

I'm using the latest tunerstudio, and have the car tuned, idling.

However, when I open up the project, and connect to the ECU, it seems that everything holds over, except for the wideband calibration.

It seems every time I shut down/reconnect, I have to repeatedly go to tools/calibrate afr table, and select the LC-1 to achieve a better idle/more accurate AFR readings.

What am I doing wrong? (I know I'm doing something wrong, just don't know what it is.) My second day using tunerstudio, so flame away!
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Old 03-30-2014, 04:16 PM   #2
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You are not doing anything wrong. That window is to perform the calibration, it doesn't know what calibration is inside the ECU. Same goes for the other sensors.
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Old 03-30-2014, 04:31 PM   #3
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Originally Posted by Reverant View Post
You are not doing anything wrong. That window is to perform the calibration, it doesn't know what calibration is inside the ECU. Same goes for the other sensors.
Ok, is it just all in my head that it seems to run better after I do that with a laptop plugged in?

Do I need to program the Wideband outputs/serially connect to the wideband and change some things? (Set it up per instructions, free air cal'd, etc...)

Seems like it idles better after I do the calibration.
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Old 03-30-2014, 05:59 PM   #4
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Its a placebo effect.
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Old 03-30-2014, 09:09 PM   #5
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I'm pretty sure that this does indeed calibrate the MS interpretation of the voltage signal supplied by the sensor (or in the case of the AFR sensor, the signal supplied by the controller). It is a write sequence only and cannot extract the values previously written in order for TunerStudio to show what is in the MS before the write. If one puts in the default LC-1 / LC-2, then MS knows to interpret 0V as AFR=7.35 and 5V as AFR=22.39, with linear interpolation in between. Probably it should be titled "Calibrate O2 Sensor Table" to be more in keeping with "Calibrate Thermistor Tables". Either way, it does not affect the sending unit, only the interpretation of the data.

In my case, in order to get the MS to read the same as the G-5 gauge, I changed mine to 0V as 7.2AFR and 5 as 22.2AFR. Basically this offset the curve.

Why I believed the G-5 over the MS was that it was correct before with the factory ECU. Now the unit is grounded through the MS so this could be faulty logic, but now they read the same. When I have the car dyno'd, then I will know how to offset both of them to give what the dyno system reads.

As to TS or the MS causing the LC-1 to run a calibration cycle, I would doubt that is possible if the connection from the Innovate controller to the MS is an analog output only.

Back to the question. The best way to see if you are indeed affecting the readings by your re-calibration writes is to have EGO turned off (fully open loop), and the engine fully warmed. Then the MS will be controlling the engine fuel in a steady manner. Then go to Tools /Calibrate AFR Table and burn in a custom with values like 0V ->3AFR and 5V->10AFR. Now the AFR meter in TS should read about half real. If values were 14, then they would suddenly show 7. Cycle the MS (turn off then on). Still show 7? Then the burn is persistent (didn't get lost). If back to 14, then you are correct that MS is loosing the values.

If not loosing the values, then go back and Write to Controller the LC-1 defaults, and look for your issue somewhere else.
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