A while back I posted about a '68 that had an intermittent miss. Had changed out almost the entire ignition system with no luck so decided to rebuild the Ford 2 barrel carb just to eliminate it from the equation. Well …. That was it! Now I have a hesitation when accelerating from a stop. I'm going to fool around with the accelerator pump but is there anything else? Checked the timing and it is on at 6 degrees. Engine is totally stock. I'm also picking up the vacuum from the port in the back of the carb and not from the manifold.
Make sure you are getting a full pump stroke out of the accelerator pump. With the engine off and looking down the throat of the carb open the throttle medium-slow and smoothly. Is the pump shooting both sides and starts shooting when you first move the throttle? Is the shot continuing strongly through at least 3/4 of the throttle opening? It should do both.
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Acceleration Hesitation
