Does a tuner screw with the mpg computer?

aldo_45030

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Loaded in the tow safe from a Superchip tuner. MPG's went way up then my bubble was burst when i heard those readings are not valid.
 

powerboatr

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most tuners confuse the mpg lie o meter
becasue the tuners lie to the ecm to make it do things not normal

my predator was close (2-3 Mpg) with the tow load and 65hp load, but the 85 and 100 were way off
 

Tbar

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lol...................mine shows me getting anywhere from 25-30mph. :roflmao


Tbar
 

BamaSixGun

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powerboatr said:
most tuners confuse the mpg lie o meter
becasue the tuners lie to the ecm to make it do things not normal

my predator was close (2-3 Mpg) with the tow load and 65hp load, but the 85 and 100 were way off

do all tuners do this or just a certain manufacturers?
 

aldo_45030

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OK i checked my MPG's of 16.2 towing the boat 3500lbs on the highway.
Did some good old cipering and be dang gone my calculations were with in .2 of the computer. Will need to do more testing to see if it was a fluke. I am in the tow safe mode.
 

powerboatr

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bama-six-gun said:
do all tuners do this or just a certain manufacturers?
I would suspect all do it to a degree, probably some worse than others
i wonder sometimes if my math is even correct :eek:
 

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