accelerator pump Q..

[flatjack9]

Originally Posted by ford38v8

They are two different fuel systems. Three altogether in a Ford-Holley '94.
Power valve opens a system and stays open during the duration of a low vacuum period. Accelerator pump is a single squirt of fuel each time you stomp on the gas pedal. Th third system is controlled by the two screws at the back of the carb, which regulates the amount of fuel delivered to the venturi at idle speed. This system continues as long as the engine is running. Back to the second channel, where the accelerator pump delivers to, are the two nozzles at the top of the air horn, which suck fuel through the main jets in direct relation to the volume of air going through the air horn.

The accelerator pump gets it's fuel directly from the float bowl independent of the jets.