I just install the SAFC 5 button and Apexi terbo timer, my problem is why i dont get the correct reading from the o2 reading even i adjust the safc to - setting. is there any guide line to set the safc and the timer . im using 4g93t engine still stock only with air filter apexi and feul regulator custom made (EFN) :D one more thing i want to sent my car for dyno and setting, where is the place and what is the cost$$$
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