Tony,
That was nice of them. I'm just not sure what's wrong with that bank. It would appear that it gets too much fuel or not enough spark to burn the fuel(? that don't make sense) at 2500 but why just at 2500... I'm not getting this...I'm sorry man, my only input is useless.
I'll pull a guess outta my arse...that O2 sensor is n/g? but that would show up big time on the scan's cross count numbers.
I think if I have time at lunch I'll look in my helm FSM in section 6E, emissions. If I learn anything I'll post up.
hang in there man, somebody knows this answer & they'll post up.