I have an unusual problem that I can not resolve and would like some advice. I am the proud owner of a 2002 CC with a rough idle once the engine warms up. Cold it idles great. I have tried all the usual solutions, cap, rotor, plug wires, plugs. No vacuum leaks, intake manifold gasket has been replaced. Diagnostics with a good tester reveals an intermittent skip on cylinders one and three. Most of the time it is more "inter" than "mittent". However, on rare occasions it will idle acceptably. SES light is not on, no error codes.