does this sound like an air leak I can adjust the low end any way and realy no change I can bring the idle down and it will idle fine for a few seconds and the rpm drops and it dies I can adjust the low end needle in all the way and the engine still runs at idle and the rpm drops also when i throtdle up the carbs loads up and dies my other avistar runs fine the low end is adjusted out about 3/4 turns ive checked the fuel line and the tank so what do you all think michael