SuperMID M1, MPG Computer

[krousdb]

First, an update on the SuperMID and ignition off. I was focused on watching the pulse width go to zero and the SuperMID staying powered up, which it does. What I just noticed though is that the distance stops accumulating while the key is off. But you can't blame the SuperMID, it is still able to record distance, it's just that ignition off also cuts power to the speed sensor, so it is not able to send a pulse.

So yesterday, the SuperMID said 64.5 MPG on the way to work and 63.5 on the way home. I was very surprised that the difference between the two wasn't more. On the Prius, in similar temps it would be 65 there and 55 back.

So since I expected 51 MPG, a 64 MPG ave is close to 30% overregistration. Also, the distance was low by 3% so the total change to the fuel parameter was around 30%. I changed the distance parameter from 2572 to 2659 and the fuel parameter from 14052 to 10837. For the final stap, I filled the tank to the 2.5 OHM mark which worked out to 51.9 MPG.

More to come!