2nd Gen Non-Engine/Transmission Overhead Fuel Computer?

[JFitzgerald]

It is handy to use for watching my fuel usage, but when I check the displayed avg. mpg against actual calculations, it is consistently 2. 5 mpg higher than actual. I'm really reaching here, but is there anything that can be done to calibrate this thing to read correctly? At least I know where I'm at, but it would be nice to not have to do the mental math, like with a post-tubo pyro.

 

[nps]

Have you changed tire sizes? Are you running a box? Your sig doesn't say. The tire size is programmable. The fueling box just messes it up.



With my EZ, my OH Comp MPG went about 2 mpg up. When I put the 315 tires on (without recalibrating the spedo), the avg MPG display went back to being accurate.