i got and elebrok carb that i have had for a while now but for some reason in the mornings it has some trouble. i go to start it and even though its cold it still starts up immiediately with a little touch of the gas be for i crank it up. then it starts up fine and idles nice and smooth for about 30 sec and then starts lowing and coughing and idleing bad and so i have to stay out there and keep my foot on the gas to make it idle higher manually, does anyone know how to adjust this. need help it gets colder by the day.