Curious to know how the car knows the MPG it's getting. Is it from the PCM?
I was wondering if I could mod it to read instant MPG, and if anyone has done it before. Did a search with no luck.
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04-06-2013
Curious to know how the car knows the MPG it's getting. Is it from the PCM?
I was wondering if I could mod it to read instant MPG, and if anyone has done it before. Did a search with no luck.
04-06-2013
Yeah its a instant reading.
On a Aeroforce scan gauge there is a Instant MPG option to view, its the same thing the DIC uses to figure out mpgs and give you a rough avg of what you are getting.
Not sure if its even possible to make it read instant, but who knows.
04-06-2013
Typically it's a calculation based on PCM inputs... Engine load, TPS, VSS, etc.
04-06-2013
buy a regal, its got instant mpg....
some how im sure it works off the engines vacuum.
04-06-2013
I was under the impression that it was injector duty x rpm/ mph.
04-06-2013
Bonnevilles have instant too. :P
I'm thinking it uses the MAF sensor.
04-06-2013
You're probably all correct, lol. Kinda figured it was a stretch.
04-06-2013
the joys of having an 04 i have instant and average
04-06-2013
On 04+ only the 5 button DIC has it.
04-06-2013
yay for me
04-07-2013
I was just wondering this very thing today. For a 16 year old car I'm surprised how close my dic reads the avg fuel economy. Its consistently between .5-.8 mpg hand calculated when compared to the dic
Sent from my DROID RAZR HD
04-07-2013
Make sure your speedo is set correctly... I'm sure that figures in to the equation!
just sayin...
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