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Your OBDII computer "learns" your mods and it thinks it's "correcting" itself, but actually, it's setting itself back to factory specifications (ie you give it more air, it gives more fuel to keep the mixture at what it thinks it should be) By putting a switch on that wire, the ECU "forgets" what it has previously learned, so it can never really reprogram itself to factory specifications.
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AEM Cold Air Intake ยท Greddy EVO Cat-back ยท 18" White Konig Traffiks
APEXi V-AFC ยท ACT 6-Puck Clutch ยท MB Quart Components
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