@Alwishes...I had an CAI from AM and it ran good with no check engine. I would hook up a scan tool to pull the code, then go to this website call OBD II Codes. You can look up the code that way and have a definite start. Hope this helps. Oh yeah and by the way, you don't need a tune
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I don't have tune and my check engine light is off. Check on your MAF and make sure it's sealed good. Could be your MAF sensor is unplugged or you're leaking in air at some point due to not tightened hose clamps.