My 1999 Thunderbird will cut out on tick over and hesitates sometimes on ake Off etc.BUT ONLY WHEN HOT,I have changed Air Filter, Spark Plugs ,Pick up Coil ,Had Carbs Ballanced,Checked Carb Diaphrams ,they are O.K. I blew The Jets OUT ( but did not Strip Carbs )When it JERKS Putting the choke on SEEMS TO Improve Pick Up .Coolant O.K. Please can you help Thanks Pat