Well I have posted this rough idle/stall question a few different places so I thought I should post the solution.

$414 later I have replaced the O2 sensor ($196), plug wires, rotor, distributor and coil and finally the little Civic is purring like a kitten. Yes it took all that stuff and I went with Honda parts so that contributed to the cost. The rotor and distributor were both pitted and caked with green crap. Cleaning them did not help much. The O2 sensor failed in a test module that heats it up and reads the resistance. It was very low like it was not reading anything. Cleaning it made no difference. It is likely that the bad sensor was creating fuel mixture issues and the rotor was not producing enough spark for the system so that made the solution a bit more complex than what the engine code showed. It took a while to find everything. I replaced the coil because it had a rather large discolored spot on it that looked like it had been very hot. I friend of mine said he chacked it on some equipment he had in his shop and it behaved ok but it did get hot when he tested it. If anyone knows anything about coils and temperature, please let me know what may have been the cause. Anyway, I replaced it. We also checked the ignitor and it came back as operating normally. I was surprised to find it to be the original at 172K miles.

Any way, the little civic is running pretty smoothly now. The fuel econ is back to 36Mpg city and over 40 Highway So I am back to happy. Iwish the parts were less though.

Thanks for all the inputs, I checked fuel pressure and compression... and all came back great. Here is hoping for another 100K miles.

KR