what causes the erratic rpm surge? i tuned a 2015 GT with 2018 intake and IMRC deleted.
the car runs perfect except on idle, the afr would jump from around but very minimal rpm changes. even the exhaust tone would change and would act like the car is misfiring although it's not.
anyone had this issue before?
i already have the issue on my 2014 GT as well with 2018 intake.
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