MPG Readings on Overhead Display
#1
MPG Readings on Overhead Display
Has anyone ever noticed how drastically off the MPG readings on the display-vs-the old fashioned (accurate) way of dividing gallons pumped into miles traveled are?
I had a 2004.5 Ram from 2006-2010 and it was always 1.8mpg off. If the display said I was getting 18.8 mpg, then it was actually 17mpg.
I now have another 2004.5 Ram that I got last month and it is the same way but about 1.5mpg off.
Anyone ever noticed this? How does the display calculate fuel economy? Is it pulling the injector pulse width out of the engine and calculating it or is it using the fuel sender readings? My local Dodge dealer was of no use to me
Thanks
I had a 2004.5 Ram from 2006-2010 and it was always 1.8mpg off. If the display said I was getting 18.8 mpg, then it was actually 17mpg.
I now have another 2004.5 Ram that I got last month and it is the same way but about 1.5mpg off.
Anyone ever noticed this? How does the display calculate fuel economy? Is it pulling the injector pulse width out of the engine and calculating it or is it using the fuel sender readings? My local Dodge dealer was of no use to me
Thanks
#2
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#5
The computer estimates your MPG by your pedal position, speed and fuel gauge movement. If you have a chip the pedal position will be off, change in tires changes your true speed. I just use mine as a reference to see how bad my mileage changes when towing, flooring it ect... If you expect it to be right you’re expecting too much. Not even my wife’s 2012 gasser's MPG monitor is right.
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