So im currently running my midpipe/stock exhaust combo without a o2 sensor....installed today ....I have put on 75 miles without a cel....but upon watching me race through first, my brother noted that not only did flames come from my exhaust tips....but from under the car as well...and not just any flame a huge flame that lit up under the car like neon lights. I reworked the midpipe's alignment and found it to be as close to perfect as possible....but it keeps firing under the car . Is this simply because of the lack of an O2 sensor ((the space created)) or did I fubar something? It is from the Rotary online store w/o resonator....

 

You have a bung without the sensor plugged in (creating an opening in the side of the pipe), or is there simply no bung?

 

I don't know about the sensor but on my race car a formula mazda we run the b13 engine and ther al realy bad about doing that every time you start it and on decelleration when running on the rich side.

 

I'd say take put it up on the jack, take it apart, check to see if there are any holes or damge to the pipe, and check if theres anything inside of the pipe and where it connects to, then re-install it and see what happens... Good Luck Buddy!

 

Hmm reinstalled it...after fabricating my own ring for the front end piece....finally got my sensor off my cat and installed it after almost breaking it ....seems fine now =) appreciate the advise

 

wtf..

and followers..

beers