So i just got a misfire on cyl. 8 (cheked with obd scanner) how can i approach this problem? Is this normal on a 02 ws6 a4? I did my lt headers and used the rear o2 sensors by accident and just unpluged the front ones but i just fixed that problem i bought some vette rear o2's (long ones) and hooked em up to my headers and my front o2 sensor plugs and just disconnected the rear ones since i dont care about the ses light being on...which one is cyl 8 and what do i have to do to try n fix the problem

 

you probably damaged a plug or wire when installing the LTs. Id start with new plugs and wires and see if that fixes it

 

Fixed it....i guess i didnt plug the wire onto the actual plug....

 

good to hear