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EFV-8 Club Forum / 1940 Ford Discussion / 40 loading up fuel/ flooding out while driving

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Discussion Topic: 40 loading up fuel/ flooding out while driving -- page: 1 2

DMMuir

02-10-2025 @ 1:46 PM

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I recently installed a factory reman 94 carb on my 40.
After a week it started spewing fuel out the carb, ends up the float was holy.

That has been replaced, and this new issue came up.

After a short drive it starts sputtering, and I have worked out that it's loading up on gas and flooding itself while driving. I went through and thoroughly cleaned and rebuilt the carb and the issue persists.

Thoughts on the next step?

kubes40

02-10-2025 @ 4:21 PM

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My initial thought is the float is set too high.
If you manually operate the throttle, can you keep it from loading up?

Mike "Kube" Kubarth

kubes40

02-11-2025 @ 5:25 AM

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Giving this issue more thought... I have had trouble with those "groose jet" needle / seat assemblies. Is that what you have by chance? The two that I have witnessed stuck open, never shutting the fuel off.

Then, you may want to check the fuel pump pressure. Too high and it will force fuel past the needle.

Mike "Kube" Kubarth

37RAGTOPMAN

02-11-2025 @ 6:40 AM

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do you have a good fuel filter before the fuel pump ?
maybe you have particles of dirt in the system.,? affecting the needle and seat ?
how old is the gas,?
also check the fuel pump pressure,do you have a electric pump ?
hope this helps 37Ragtopman
rule of thumb
also remember that most fuel problems are electrical
how it the coil and points, ?? distributer been rebuilt lately ?
all wiring clean and tight ?

This message was edited by 37RAGTOPMAN on 2-11-25 @ 6:46 AM

carcrazy

02-11-2025 @ 11:01 AM

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Has the vehicle experienced any induction system backfires? If so, the backfire may have blown out the diaphragm in the power valve which would cause excessive fuel in the intake manifold and loading up.

DMMuir

02-11-2025 @ 1:04 PM

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if it's idling or running in the driveway it seems fine. Problem only seems to come up when driving, and then pretty quickly.

DMMuir

02-11-2025 @ 1:05 PM

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Not sure what a groose jet is. I will look it up.

factory/original fuel pump

DMMuir

02-11-2025 @ 1:06 PM

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new fuel tank and line. factory pump, good filter in the system as well.

the electrical/ignition seems good. all as good as it can for it's age!

carcrazy

02-11-2025 @ 1:53 PM

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Here comes what you might think is a dumb question. When the carburetor was put back together, was the gasket installed correctly so that all of the holes were connected without leaks between the airhorn and the main body?

40 Coupe

02-12-2025 @ 5:31 AM

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If it seems flooded after sitting for a short period making the car hard to start and runs extremely rich it is possible the power valve is ruptured or it's gasket is leaking. Daytona parts in Fla has the best rebuilding kits for the proper 40 Carb which is the 91-99.

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