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So i bought this thing and did the "performance tune" thing on my car... I still have a check engine light. All i did was set the performance tune, thats all. Somthing i do to it... I have mac axel back exhaust and cold air intake. Please help!
 

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Kuruption said:
So i bought this thing and did the "performance tune" thing on my car... I still have a check engine light. All i did was set the performance tune, thats all. Somthing i do to it... I have mac axel back exhaust and cold air intake. Please help!
What octane are you running?
 

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Kuruption said:
87 octane i believe... well last time i fueled it was.
That's why. With the performance tune you need 91 at a minimum.
 

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Kuruption said:
I have almost an empty tank... can i just fill 91 octane in there?
yeah, that should work!
 
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