[sawdust123]

Well, it is finally fixed.

The scanner helped me narrow down exactly how to duplicate the problem. All I had to do was rev the engine north of 2000 before the car had reached operating temperature. To avoid the MIL coming on, I would just wait till the car had warmed up before driving. It brought back fond memories of the carburated cars of old that didn't need no computer with fancy sensors.

As it got colder the problem got worse. I went out of town for 4 days and left the car with the dealer with instructions on how to duplicate the problem. After 8 days the dealer had run out of things to do. They had checked the harness, check the sensors, substituted the computer, etc. Nothing worked. Out of desperation they tried another camshaft sensor. That worked!

The thing is the sensor tested OK. Also, why was the problem temperature dependent? I may never know.