i think i did, tightened it nicely
its p0420 so its the rear o2 going wonky with the high flow cat..i need a tune sine I am also burning too rich, killing gas here lol
i ordered a defouler to help with the engine light and maybe gas issues so hopefully that comes soon

 

#1 is for your downstream O2.

#2 is probably for your normal upstream. It apprears to be in the same spot at stock.

 

That's the same code I'm getting. If your sure the downstream O2 is good, yea you'll need a tune.

 

It probably is not really running rich, your sensors just think so.

 

im getting white smoke out the pipe too and it smells like its burning rich..going thru gas pretty quick..i ordered a defouler so lets see if that helps..ill keep you guys posted :)

 

The computer is set up to compare the HO2 sensor readings when a stock cat sits between them. Therefore, you MUST get the computer re-programed (tuned), to get it happy.

The computer probably thinks the engine is running lean so it's dumping gas into it. Something like that.

 

ya i hear you, i just need an SS driver side a-pillar to put in the wide band gauge but i cant find one yet..and im short on money lol..so someone buy that custom bumper :)