Quote:
Originally Posted by trikkonceptz
Understanding its purpose and use how come DFCO reads 9999 on the scangauge while EOC reads somewhere in the ball park of lets say 2800 mpg's, why not 9999 as well?
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Ya, I've got to guess that you mean Engine On Coast, since Engine Off Coast would mean no fuel going through the injectors and therefore infinite (9999 and then some) miles per gallon.
With Engine On Coast, you're still using some fuel to keep the engine idling while coasting. Otherwise (obviously) your engine will stop running. So the mpg's can be really really high, potentially even so high that the scangauge will show 9999 mpg, but never infinite.