Im trying to tune with a NGK AFX in the sens1 bank 2 port of my LG super pros but it keeps reading 16.00 until i get to about 2~2500rpm then it seems to read normal. The weird part is that if the car is rolling 40+mph it reads 11.0~10.8.
I know the tune is not that far off. No knock, idle seems fine. I tried to adjust the EOI timing -20* twice but no change.
I originally thought I had a toasted 02 sensor from a misfire(unplugged coils) so I got a new sensor but more of the same.
So now Im thinking exhaust leak, has anyone else had this issue? I have foil tape under the clamp on the header and the cat delete pipe.
2007 Z06 cammotion 232/242 118 halltech intake catless LG super pro 1.7/8" milled heads .040 /12:1 93 octane E10
Im going to try to seal up the exhaust some more rinse and repeat....