accelerator pump

  Q: My Holley-equipped vehicle has a stumble from a dead stop. Someone told me the accelerator pump nozzle may need resized. How do I know if I need to change an accelerator pump and how do I determine the proper size? A: It’s true that one of the most common causes of stumble is not having

Prevent engine sputtering by learning how to properly tune your Holley-style four-barrel carburetor’s accelerator pump. Watch this 24-minute video and learn everything you’ll need to know to achieve smooth, consistent launches at the track, and the pedal response you seek on your next drive. Before you dive into tackling your accelerator pump adjustments, you may