Holley Carb Draining into Intake

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Old 03-25-2021 | 03:59 PM
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lahatte's Avatar
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Holley Carb Draining into Intake

When I started my engine cold, it ran for a moment, then started to die, as if flooded. Going over to the front of the car I can hear the gasoline draining into the intake.

Anyone know why that might happen? I don't have reason to suspect a bad powervalve yet, but I'm still investigating.

Thanks.
Old 03-25-2021 | 04:10 PM
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From: Lost In Time!
Holly neddle and seats have a tendency to stick when dirty, try giving them a clean and adjust the floats.
Old 03-25-2021 | 07:18 PM
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Originally Posted by Iowan
Holly neddle and seats have a tendency to stick when dirty, try giving them a clean and adjust the floats.
I have replaced the front needle and seat already. I suppose maybe the rear one could have an issue. I haven't removed it yet.

I had leaking issues at the front and just replaced the accelerator pump diaphragm, which seems to have stopped that leak, but now I get fuel under the rear accelerator pump.

This carb was purchased 10 years ago from a rebuilder, and doesn't have a lot of running time on it. It had been great until I tried to start the car last fall and got the flooding issues.
Old 03-25-2021 | 07:49 PM
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From: Lost In Time!
I've never had any luck storing carbs, i generally put a kit in them before I use them again after sitting.
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Old 03-26-2021 | 07:26 AM
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Originally Posted by Iowan
I've never had any luck storing carbs, i generally put a kit in them before I use them again after sitting.
I agree, all the rubber drys out and cracks, and will add to also check the floats to make sure they are also still good...
Old 03-26-2021 | 08:22 AM
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la -
Assuming the carb is intact (and I agree a rebuild might be in order), you did check the float levels, right (assuming a Holley)?

Archer
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