TimoL Posted June 29, 2018 Report Share Posted June 29, 2018 I would like to measure the voltage at the fuel pump terminals and be able to log it with the ECU (Link G4+ WRX ver5/6 plugin). Is this doable with any of the free inputs? Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 30, 2018 Report Share Posted June 30, 2018 You could get the ECU to measure 12V using a simple voltage divider but the thing I dont like about doing this is to get an accurate measurement you will have to connect fuel pump ground (chassis ground) to the ECU sensor ground. This has potential to mess up all your other ECU sensor measurments. Quote Link to comment Share on other sites More sharing options...
TimoL Posted June 30, 2018 Author Report Share Posted June 30, 2018 6 hours ago, Adamw said: You could get the ECU to measure 12V using a simple voltage divider but the thing I dont like about doing this is to get an accurate measurement you will have to connect fuel pump ground (chassis ground) to the ECU sensor ground. This has potential to mess up all your other ECU sensor measurments. That's exactly what I thought. Maybe I could cobble up an Arduino based voltage logger and connect it to the CAN bus. I do not want to compromise other sensors since I'm running a fuel pressure sensor and differential fuel pressure compensation. Quote Link to comment Share on other sites More sharing options...
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