Thanks TP. I sprayed the heck out of the hoses with carb cleaner but could not get a surge or change. I can try again per your areas to test but how about this? It has cooled off her in So Cal, so now, after driving on the freeway for a while and exiting to a stop, my temp gauge reads about 72-76 degrees and it idles nice. As I sit there and wait, it warms up to around 79 degress and boom! The idle drops to 500 and gets rough. I take off and go down the street, stop again, temp drops, good idle. Sit there and gets hotter...77, 78, 79 boom! Rough idle! Doesn't this sound like something is sending a false signal or something, or causing a richer run condition? Do you think this would be an air leak issue being so precise on reaction?