Quote Originally Posted by LittleBeast View Post
I replaced all 4 O2 sensors in a matter of 1 to 2 hours with no removal of any exhaust components just a few months ago. Why would you drop the exhaust to do this?
My 2 rear's are fused in place; used acetalene torch, had them glowing and still could not get them to turn; gonna have to cut out the mounts and weld in new ones, then install new sensors; likely got the same problem with the fronts; carbon filth the engine builds up bit time on sensors; codes went away for a while after heating them up I guess because I burned off all build-up. they just get fouled badly