SO i installed the race header and it i just got home tonight and let it idle for a sec and the exhaust reeks of fuel. any ideas on why or if i am running to rich. i dont see how it could? anyone ever had any problems like this. i know its o2 sensor that sends info for a/f regulation but what coud make smell like that. Btw its an 01 civic ex with evo2 exhuaust, v2 intake, and dc sports race header.
Thanks.
Shane

PLEASE HELP ASAP

 

did you use a torque wrench when you installed your header? if not you could have an exhaust leak.