okay finally have my autotap again.....i am seeing my o2 bank 1 sensor 2 basically going from 45-50mv, while bank 1 and bank 2 sensor 1 is bouncing around like it should, bank 2 sensor 2 is moving between 100-150 mv. My injector pulse width average bank 1 and 2 is about 3 m/s. isnt it supposed to be like 1.5 m/s? short term fuel is -3% bank 1 and 2. 0 knock and timing advance is 17degrees. what do you all think?? think that bank1 sensor 2 o2 is dead or cat acting up??? this is all at idle...

 

Its either the cat or the sensor. Most likely the sensor. Swap the after-cat sensors from side to side and see if the problem follows the sensor (faulty sensor), or stays where it was (faulty wiring or cat). Everytihing else seems fairly normal, although the pulse widths seem a bit high. What is your idle speed?

My online scanner guide indicates that the normal idle pulse width is in the 1.4-1.6mSec range, but I seem to be seeing more and more cars with numbers above 2.0mSec at idle. My wrtieup was based on what I saw with my "stockish" engine.

 

idle speed is ~650, which i believe is normal. Ill try to move the sensor and see what happens.