Quote:
Originally Posted by SuperTom
well I win dumbass of the day award. Looks like when I first installed my UEL headers I put in a o2 spacer on the rear o2 bung to try to drive a bit on the stock tune. I never went back and removed it after using the OFT. Haven't tested yet but I'm sure that's the culprit. Also looks like there is a v4.03 for k00c now so I will load that in too.
I'm used to corvette world where we just tune out or turn off the rear o2 sensors and you can leave them in or take them out. Looks like on these cars they must still serve another function besides checking for a cat efficiency correct me if I'm wrong.
Thank you everyone for steering me in the right direction
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in ots tunes af#3 (=rear o2 sensor corrections regulations ) are still enabled at stock values (+-50%), you could just put them at 0 and it just stop working
but steve said that CEL is relative to FRONT o2, not the secondary one
so if you have that cel, you need to control afr and check for leaks