My 2 DICs Don't Work the Same - I Wonder Why?

[BillBoost37]

IIRC the pcm feeds the DIC most of it's fuel related info.

The true fix here is to say.. close enough is good enough. That's just how these senders/gauges are setup. The fuel tank isn't a perfect squared out tank, the sender doesn't compensate for tank shape, and at best it's a good reference not an exact measurement.

[sparkydog]

I think I know how/why the DIC fuel consumed was 1 gal off of real world. This GTP was driven by my daughter for about 3 years and she probably never reset the MPG portion of the DIC. She was probably getting better gas mileage then I did once I started hot-footing around after I reclaimed the vehicle from her. Once I read the owners manual I discovered the DIC uses the MPG calc to also calc the fuel consumed. So I realized I should try resetting BOTH the fuel consumed AND the MPG values during a gas station fill-up.

At the next fill-up after that, my real world gas consumed and DIC gas consumed values were within 1/10th of a gallon.