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Okay so this is my first time posting on here and don’t know how to make a thread or even as a question. So I’m sorry if this is correct but I have a 2011 ls v6 with long tube headers, cold air, high flow cats and exhaust with tune and I’m still throwing a check engine light. It comes up as running to rich. I’ve changed coil packs and spark plugs with just oem spec plugs and that probably the issue but don’t wanna spend 300 on plugs if I don’t have too… please help lol
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