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370Zebruh · 01-04-2019, 09:32 PM

Hey guys not sure if im posting in the right area or not im new here but I just installed some ISR resonated test pipes WITH a cel fix (basically o2 sensor bungs im sure u guys know what im talking about just making sure lol) but they still threw a check engine light? Anyone know why? Heard its bad to run bolt ons without a tune because it can cause the engine to run lean but all I have are the test pipes everything else is stock.

01-04-2019, 09:32 PM	#1 (permalink)
370Zebruh Base Member Join Date: Sep 2018 Location: So Cal Posts: 2 Drives: 2015 370z Sport Rep Power: 6	Test pipes threw a CEL with CEL fix Hey guys not sure if im posting in the right area or not im new here but I just installed some ISR resonated test pipes WITH a cel fix (basically o2 sensor bungs im sure u guys know what im talking about just making sure lol) but they still threw a check engine light? Anyone know why? Heard its bad to run bolt ons without a tune because it can cause the engine to run lean but all I have are the test pipes everything else is stock.