My dart runs great, so it seems fires right up hold idle by her self after only a few seconds (no choke), sometimes when it's not fully warm yet and I go to accelerate not even hard it will go fine for maybe 2-3 seconds than sputter stumble than pick right back up where it left off, even on gentle accelerations. I was thinking my carb I didn't personally put it on came with the car I think it's a Holley 600 or 650. Any advice where to start?