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Not to revive a threat from the dead, but I am having this issue as well.
I purchased a car that has down pipes without a check engine light. Therefore presumptuously the car is tuned. The previous owner did not do this. I have no idea what tune is on the car but I would like to remove it and put it all back to stock. n63TU engine. any ideas on how to at least find out what tune it is?
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