I don't know where to turn to now, so I'm starting this board. I just put in a new edelbrck 600 CFM carb to replace my q-jet, which also had this problem. When I put on the brakes(and now even when it's just sitting there) the engine will cut off. I know it's a carb problem. I've adjusted the idle, and that doesn't do anything, set timing at 4 degrees, replaced all of the vaccuum hoses, but it still cuts off when I let off of the throttle. Please help!