holley help please 750 vac.

Purple Haze said

I go with accelerator pump, if ran good last time it was running that's were I would look. You can start it with the air cleaner removed and give it a few quick stabs while looking to see how the shot comes out of the shooters, should be nice straight steady stream.

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I highly recommend NOT checking the accelerator pump while the engine is running. If it backfires through the carb like he says it's doing he could fry his eyeballs. I learned the hard way when I was 17 not to look down the throat of a carb and hit the gas while it's running. Took 3-4 weeks for my eyebrows and hair to grow back. Lucky for me I wear glasses or I might be blind today because of it. You can check the accelerator pump just the same without the engine running.