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Originally Posted by guruerror
Why? Fuel is fluid whether it's gas or diesel. And a gallon is a gallon regardless.
It would stand to reason that the computer is simply calculating how much fuel is pumped thorough the injectors together with how far that makes the vehicle go (based upon the revolutions of the wheel) to work out it's equation on what the MPG is.
If the computer is programmed with accurate information regarding tire size the computer should be accurate...key word is 'should.'
Mark: Did they replace your ECU when they did the conversion? Or just reprogram your existing unit?
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Yes, the ECU was replaced with that of a diesel. The only thing overwritten would be the performance tune written by a tuner. (Diablo Sport)
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Originally Posted by 2010_5thgen
driving any car at 85-90mph isnt going to get you great MPG's. best fuel economy speeds are right around 60-70. anything over that and your pushing higher RPM in the highest gear.
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And considering I'm running 37's, I still have 4.56 gears so I imagine that wasn't very helpful...lol.
Mark