there are two methods to use in conjunction with one another in order to set the low speed needle perfectly. First - to get it in the general area, pinch the fuel line closed about 2-4 inches from the carb. If it takes more than 4 or 5 seconds to stall, it is set too rich. If it stalls almost immediatly, it is too lean. Adjust accordingly 1/16th of a turn until it stalls after about 2-4 seconds. Once this is done, drive the car around abit, then come to a complete stop. Keep the brakes applied fully and count to 10. Then apply wide open throttle. If it bogs down before clearing its thoat, its too rich. If it coughs, or hesititates, then it is too lean. Adjust accordingly in only 1/32 incriments - or nor more than 1 hour on a clock. This should get u going.