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Hi everyone. I purchased my Kia Forte EX 2.0L with Economic Pkg in June. When I first drove around this car, "eco" button lited up right away after I started the engine and pushed the gas pedal. However, I slowly recognized that "eco" lights doesn't lit up immediately. It takes few minutes or driving few miles to lit up. So I was just wondering if it was my problem. If it's not how did you all fixed this problem? I mean there is nothing wrong with this car, but I kinda get distracted.
 

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2021 Forte GT w/GT2, Currant Red, Wagner-Tuning Intercooler, Evilla Exhaust, Takeda S1 Intake
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Just watch your gas mileage -- divide miles driven by gallons purchased. If you find your MPG is getting poorer have your dealer take a look at it. Not getting the ECO light could be due to your driving habits or maybe hilly terrain. Does it come on quicker when you set the cruise control?
 

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well my eco light turns off if my rpm or speed gets too low. also mine is only one when im cruising or slowing down but even then, when it gets to where im at a certain low rpm or speed, it shuts off. if i ever have to accelerate it turns off too
 

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I agree with Red Rocket. I notice mine is delayed on cold mornings but shortly after driving it is back to normal. I drove across some mountains and it stays off on the climbs even with a steady speed. I would say it is from the engine working harder at those times. I am not sure but maybe it learns driving habits also.
 

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All modern gasoline engines use what is called open loop for cold starts and WOT. During open loop it just dumps fuel, ignoring all oxygen sensos. Closed loop is used once your engine has warmed up, it uses much less fuel. In this mode it uses oxygen sensors in an attempt to stay close to stoichiometric air-to-fuel ratio of 14.7:1.
 
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