Need some help! O2's quit working after LT install
 

I just installed LT headers on my 2000 Camaro and the front O2 sensors do nothing. I have them hooked up correctly and used extensions. The car runs but is running exsessevly rich and on the logs the O2's are doing nothing. Does anyone have any ideas? The worked perfectly fine before the headers were installed. Thanks!

Test extensions? Maybe power isn't getting through it somehow.

That was my initial thought as well so I tested one extension and its getting power through. The car has cheap ebay o2 sensors so I'm wondering with the 1-7/8" long tubes they are not getting enough heat to work?

Id go with Denso, I think Bosch are the problematic ones. 1 trick is to get corvette ones with a longer harness, no extensions required.

This...

Yup, Denso’s are the plan! Hopefully the cheap o2’s are the problem..

Yes, and the other trick is to make sure they're zip tied up carefully, so as to not flop down onto the headers and get fried. These are the Corvette rear O2 sensors for the LS1 years - I usually order for 2002.

It turns out that the o2’s are actually Bosch 13444... I checked some previous logs when the car had shorty headers and if I let off the throttle after wide open the o2’s would read 0 volts and intermittently flash 4.134 volts, the exact same they read right now all the time with the long tubes. So I ordered the Denso o2’s and I’ll see what happens.