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I say no too for ”chips”. But take a look at Orange Virus Tuning www.ovtuned.com, they will have soon a tuner for FJ too.
Other solution, maybe the best price-performance, URD MAF sensor calibrator: https://www.urdusa.com/urd-maf-sensor-calibrator-plug-n-play-version-1/
Welcome to the forum RyderLee.
Other solution, maybe the best price-performance, URD MAF sensor calibrator: https://www.urdusa.com/urd-maf-sensor-calibrator-plug-n-play-version-1/
Welcome to the forum RyderLee.