[Mysterytrain]

I once had a high rpm at start-up problem that was caused by the AAR opening being too large at start up. Actually, I was the cause of this problem because I had opened the unit up in an attempt to alter the time it would take for the opening to close. I adjusted the bimetal arm to create a larger opening when cold. It turned out that the opening was to large and the engine raced.
Another thought...since your car idles and runs fine after it is warm how would one explain the problem as the AAV? That device is open until pulled shut under vacuum and is technically out of the picture after start up.
The Jim Williams CIS page explains the various components pretty well.
The AAV is the cad plated flying saucer that is behind the air box on the right side of the engine.
The AAR is an aluminum device with large vacuum lines going in and out and an electric connector. The AAR is located between the number 5 and 6 intake runners on the right side of the engine.
The cold start valve is on the back of the air box.
The thermotime switch is located in the left chain housing cover.
The thermovalve is located near the number 3 intake runner. A small black bottle cap sized device with small vacuum lines going in and out and an electrical connector.
The WUR is mounted between the number 1 and number 2 intake runner.
In the picture below the thermovalve is 17a
the WUR is 54
and the cold start is 30