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Old 01-17-2008, 04:49 PM   #4 (permalink)
Master EcoModder
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Join Date: Jan 2008
Location: Mirabel, QC
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The Guzzler - '08 Hyundai Elantra GL
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The first step is to figure out how sensor inputs are interpreted by the ECU for fueling purposes. Some ECU will give more importance to the air charge temperature in regards to injected fuel quantity than others. Tweaking the MAF sensor is usually straight forward as it is one of the main inputs normally used by ECUs to determine the IQ. One of the reason IAT mods used alone do not have much impact on FE is that most ECUs will retard timing for emission reduction pourposes when the air charge temp is too high. So you need to use this mod in conjunction with a timing mod. So by managing the outputs of those sensors using most of the time resistors and capacitors, we are able to control how lean we want to be running.

The cool part about sensor tweaks is that you are always in total control of your mods if you have some switches mounted on the dash.
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