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The 7.3125 comes from the AEM doc. Then to convert the ADC counts to volts is 5V / 255 * ADC counts (X).
Then multiply by 2.375 (from the AEM doc):
(5 / 255) * 2.375 = 0.046569
RBob.
Thanks,
I changed the equation and synced the tunerpro log up to a video I took in the car and it is pretty close. I will test in car and see if I can visually see any difference.
I changed the equation and synced the tunerpro log up to a video I took in the car and it is pretty close. I will test in car and see if I can visually see any difference.
On mine I spoofed the gauge output into the ECM using 4 AAA batteries (4.5V source) and a potentiometer such that I could set specific voltages and then see what tunerpro reports. That way I can do it in the driveway and verify the equation (safer and more accurate than trying to do it while driving glancing back and forth between the gauge and TP.)
On mine I spoofed the gauge output into the ECM using 4 AAA batteries (4.5V source) and a potentiometer such that I could set specific voltages and then see what tunerpro reports. That way I can do it in the driveway and verify the equation (safer and more accurate than trying to do it while driving glancing back and forth between the gauge and TP.)
That does sound like a good idea to be able to hold specific readings for comparison.
If interested, Appendix B of the S_AUJP v7 documentation contains by part number the conversion equations for most all of the popular WBo2 controllers. In the MUST READ ME FIRST file attached here: https://www.thirdgen.org/forums/diy-...ml#post6437472
08-10-2021, 12:43 PM
