I just installed my header, anyone know why theres a CEL on? I mean I did free up flow, but would the O2 Really go off and show me a cel cause of that?

No, but possibly in the process of removing the O2 sensor you may have damaged it...

Check the engine code and see what code it sees. Depending on code reset ECU and see if it comes back.



15.9 @ 86.7mph
97 Eclipse RS

Injen CAI, 55mm TB, P&P Intake, Crower Stage 2 Cams, Hooker Header, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC

never mind, it wasnt the header, it was from the MP Throttle body, somehow its throwing a cell,,,