ok so heres the deal, running ls-turbo o2 sensor in stock location.. the o2 was covered and not sensing proporly so we replaced it.. now the o2 worked for about 2-3 weeks.. and then started running shitty again, is there usually problems with ls-turbo's and the o2 sensor? or is there something thats not right in regardes to it? any help here would be awsome!

 

Is your car running rich? Burning oil? Is the o2 sensor facing up or down? If it's down it will most likely why. Do you have access to the scan tool with ability to check life data?
Or you could just disable the o2 sensor depending on your tunning hardware/software.

 

^^^^ Covered everything +1