There is a new development....CODE 44! After I called my mechanic (@ British Auto Center...amazing mechanics and so much better than the stealer) to set up an appointment for diagnostic, the damn check engine light comes on. I don't know if this is a problem or a symptoms because:
a) it took a long time for the check engine light to come on, leading me to believe there is something earlier in the MFI/Emission control system that may have caused the left bank o2 sensor to finally foul up.
b) I replaced both my o2 sensors at 132k (about 10k ago).
c) Almost all of my engine compartment sensor connections were cleaned (by me) with electrical cleaner and dabbed with di-electric grease to protect them from the elements, so I'm pretty sure I can rule out corrosion of electrical components.
d) Once the o2 sensor code was thrown i was getting the typically symptoms, eg., black smoke, stalling, etc., but did not get the black smoke before...
I'm schedule for an appointment to test my amplifier module, check the fuel pressure at different points, swap the fuel filter, and check out my alternator. Hopefully it will throw them some codes.