Quote:
Originally Posted by M3SQRD
Your CEL is on because you deleted the stock cats. Your Alpine tune should be able to suppress the CEL but you’ll fail emissions even with the CEL turned off. You weren’t expecting the CEL to not come on when you removed the cats? The stock cats clean up the exhaust output so post-o2 sensors are expecting to read cleaner than pre-o2s so when this is not the case you’ll get a CEL.
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No, I was not expecting the CEL to come on after removing my cats because the tune would clear it. That’s why I’m here because even after the tune I still have the CEL light. I don’t care about passing emissions I live in a state where it doesn’t matter.