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Old 09-12-2017, 03:54 PM
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Default Holley 4555 Secondaries

I fired up my Yenko this past weekend, but fuel is literally pouring into the secondaries, it will barely stay running. I pulled the carb, removed the fuel bowl and looks the matter!! Any insights as to what would cause such a fuel dump?!
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Old 09-12-2017, 04:05 PM
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Too much fuel pressure, crap in the needle/seat, float (if plastic) too heavy (absorded fuel). Just a few things to check ... Craig
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Old 09-12-2017, 04:26 PM
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As earntaz said, needle/seat or float issue most likely. Also make sure the secondary air bleeds are clean, modern gas gets gummy fast on cars that don't get driven frequently.
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Old 09-12-2017, 04:32 PM
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Quote:
Originally Posted by seventieshow View Post
As earntaz said, needle/seat or float issue most likely. Also make sure the secondary air bleeds are clean, modern gas gets gummy fast on cars that don't get driven frequently.
Especially if you don't use the secondary's much.
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Old 09-12-2017, 05:52 PM
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Ok, I'll just replace everything, I don't wanna mess around - plus it's a good tutorial for Benjamin to see how a Holley comes apart, and hopefully goes back together!
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Old 09-12-2017, 07:13 PM
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Has it been a while since it has been run? Sounds like stuck float to me. I've had this happen a couple of times. Fix might be as simple as opening float sight plug, and moving float up and down with a screw driver to free it up.
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Old 09-12-2017, 09:14 PM
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Marlin -- let us know what you find ... Craig
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Old 09-13-2017, 09:49 PM
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Needle & seat is probably stuck.

Read this
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Old 09-14-2017, 12:36 PM
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^^^^
Should be required reading for anyone that has a Holley carburetor.
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