When my car is at idle i rev the motor and let of it quickly and the car will die. I checked the float levels and they were fine, what else should i check?
idle speed and idle mixture need to be correct. also if you have a manual transmission then you also need a dashpot to prevent the throttle from closing too fast.
I did check for vacuum leaks by spraying carb cleaner around the base of the carb and arounf the manifold but didnt find any. The car is an auto so i guess i dont need to worry about the dashpot. Ill try adjusting the fuel mixture and see what happens. Do i need to change the jets also?
What's the timing set at? If it's so advanced that you cannot adjust the idle with the idle speed screw (you've got the screw all the way off the throttle shaft) snapping the throttle closed will do it. Try retarding the timing a bit, then giving it some idle screw to crack open the blades then see if the problem goes away. Or if you can't give back some timing, you may need to drill the idle air holes in the throttle blades bigger. When you blip the throttle and it kills, it's not getting enough air. A dash pot was the factory's answer to this, but not my choice, it's just another part to give you trouble later on..