Hello Fred,
Thanks for the information on the Vacuum leak, I have not seen anything on that yet.
I have not tested the the heater or defrost only used the AC and it seemed to work fine through the trip.
It is exactly as you explain, it only happens after driving for a while. It does not seem to be a problem in the morning before it warms up.
On more thing We just noticed also, The generator wavers when it first starts also but once it gets going and has some load on it it seems to run fine for the rest of the time. Just wanted to be sure that was out there. Didn't know if this was related or just coincidental.
Thanks again for the help!
