I dumped a bottle of fuel injector cleaner into my tank and drove about 10 miles. It may be my imagination but it seems to be running very smooth now. With a standard transmission you tend to feel engine problems more so than an auto.
So when I got home I put the dwell meter on it an it was reading 50 deg. So something changed and I set it 40 deg. Then I checked the tail pipe AFR and it still reads around 15.2 AFR. I wonder if my new narrow band O2 sensor can be setting the wrong mixture. I've never heard of a narrow band sensor not making 14.7 AFR. I do miss my wideband unit in the car. It was so nice getting 14.7 AFR after 15 seconds of engine running.