It seems that it is common suggestion that I get out and drive this car which I plan to do this week out of town on the highway. With regards to the Co adjustment, I live in Canada where mandatory emissions tests are required to be taken at registered facilities.

The car upon its first attempt failed the Nitrogen Oxides (No) component of the test. It was suggested that the car had residue in the engine which needed to be cleaned, which was done. During the cleaning of the engine with a Motorvac machine, my mechanic noted that it was running lean and so made adjustments to make it run a little richer. The car was then brought back to the testing faciltiy and ret-tested at which point it passed the "No" test with flying colours but failed the Hydrocarbons and Carbon monoxide components of the test. The testing facility quickly suggested replacing the O2 sensor.

I was uncertain whether this was the solution and conferred with my mechanic, who noted that the car was running too rich and that the Co had to be reset.

I am still attempting to resolve may hard start problem and this emissions test issue. If anyone is able to shed any additional insight on these areas, please accept my gratitude in advance.