On a whim I decided to check the O2 sensor. Its a brand new bosch sensor. I attached a meter and saw an output from the sensor usually about 100mv and occasionally dropping to about 40mv or so. So I took it for a 2 mile test drive with the O2 sensor disconnected and it ran the same as if it was connected.....ie I still had the misfire/stumbling/hestitation. And upon my return I checked the codes and there was still no code for the O2 sensor.

Now I am quite confused. I expected there to be huge difference between running with and without the O2 sensor. And I also expected a code to be generated.

Any help would be appreciated.

Thanks,
Gregg