Exhaust question

[1995 brian]

Alright so quick question i purchased a turbo back exhaust for a 97 gsx and theres nothing for the o2 sensor where the cat is. so what can i do. Do i just leave it disconnected or is there something else i can do?

 

[007jimmy]

You can leave it out, but it might throw a CEL. Take it to an exhaust shop and weld a bung in. The second o2 is for checking the cat, not for fuel trims.

 

[dsmotors95]

here is the bung you need..just take it to a muffler shop and get it welded on or if you can do it
STM: "CHECK ENGINE FIX" | REAR O2 SENSOR SPACER

 

[1995 brian]

Oh ok awsome thanks for the replies guys.

So an update.
I installed the exhaust and obviously it poped a code because of the o2.
I noticed it had more power for sure but i also noticed its waisting alot more gas then before. Is this normal? It s a full 3" exhaust. Another thing is when i really step on it it pukes black smoke. Is this because i aint running a cat? Or am i running to rich?
Thanks for any feedback.

 

[dsmotors95]

wasting more gas?
black smoke out the exhaust?
definitely running rich..make sure you dont have an exhaust leak by the o2 elbow?

 

[bryanwheat]

Check for boost leaks, black smoke under throttle would indicate a rich condition.

 

[dsm-motorsport]

More than likely a BOOST LEAK man!!!

 

[Absolut_VIII]

Check for boost leaks, black smoke under throttle would indicate a rich condition.

+1, def a boost leak my friend