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I have a 2012 hyundai genesis 2.0t with some bolt on mods like headers, exhaust, cold air intake, and some little things like oil cooler.
My problem is that I started my car today and it seemed ok til I looked at the afr gauge and seen it was idling past 18 so it was showing no numbers and so I just waited til it warmed up and it was still reading that so I decided to give it a little gas to see what it would do and when I did it about bogged out and the gauge was reading around 10 or 9 just really rich. Also after that it decided to give its self some throttle and instead of staying at 750-800 rpm it went up to 1200-1300 rpm for some reason and at that point it was idling with a afr reading of around 15 and then the afr gauge number just started to rise back up too 18. Idk what to do im lost. And im pretty sure the car has some type of tune on idk I bought from a guy. Someone pls help
 
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