One point is that this car only has ONE O2 sensor.
It's from 1999 after all, and it didn't become standard with two until 2000 or later, when assorted Emissions control regulations came into effect.
I'm pretty certain the old error message for the O2 sensor was something like 'Permanent heater error', that is, the heating element was failed, which means it should still work as soon as it was heated by the surrounding metal and exhausts.
It never triggered the 'ECU warning' light on the dash, after all. (Still doesn't trigger it)
Dropping the exhaust.
Should probably take a spin past the local DMV and say hello to the guys doing safety and emissions checks, too.
It's not very far, and they all know me...
(If I get it running without dropping the exhaust, I may pop by for an informal emissions test)
My neighbours probably won't like it, either.
Does a FU catalytic converter kill the engine like that?
(Since I don't have any O2 sensor after it, I mean)
Thinking of stopping by a parts store and pick up a few things tomorrow:
Tool for mounting said sensor...
Pressure testing kit.
Oil filter and a couple of cans of oil.
(May as well change the oil while I'm busy taking everything apart... )