[aways]

I have a 1987 Targa that I don't drive very much. It only has 70,000 miles. Two years ago I barely passed smog with just under the legal limit of NO. Today, my car failed because the NO was just over the legal limit at 25 mph. HC and CO were very low. I drove the car around for at least a half an hour, and it appeared to be well warmed up at the time of the test.

The technician told me to add some octane boost and come back, which I did, but that didn't help. From what I understand this is a symptom of the car running too lean. It looks like I'm going to have to take the car in for some diagnostics and repair, but I thought I would check in here to see if anyone had any suggestions for how to deal with this problem. Thanks in advance.