Carb Question
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Carb Question
First let me say, Thanks for letting me join the forum. This is my first post but am sure it wont be my last.
I have a 53 f-100 that has been I my family since 1973. Grand father, me, daddy and back to me! It has a 54 model 239ci in it and up until this week had been running pretty good.
I recently rebuilt the carburetor and it has been running fine. I drove it up town last week and had some brake issues on the way home. Well I rebuilt the brakes and it has been sitting for a week or so. I went to crank it to drive it so I could make sure the brakes were right and the carb was pouring gas everywhere!! Cant figure it out. Thought maybe the float was stuck so I took the top off but all seemed fine. Any ideas?? tried to post pics of carb but don't know how right now.
Thanks from a confused f100 owner!!
Laughing Gas
Joined: Oct 2012
Posts: 831
Likes: 7
From: Milford, Michigan
Sounds like the float was stuck open for some reason. Dirt in the fuel could cause the issue if it gets into the fuel inlet needle and seat. If you are using a brass float, make sure it doesn't have fuel in it. Could be a small leak which took a week to get heavy enough to sink the float.
Cargo Master
Joined: Aug 2010
Posts: 2,927
Likes: 135
From: Houston
Stuck needle and seat are the first thing to check. You may have un-stuck it when you removed the carb top.
If your fuel is leaking down into the manifold you probably have a blown power valve, the wrong power valve, or you put the wrong gasket on the power valve. Some carb kits come with the wrong power valve and or gasket.
edit: one other thing to be careful of is electric fuel pumps. Most electric fuel pumps put out more pressure than the old Ford carburetor can handle.
Nice looking engine picture. Please post pictures of the truck.
If your fuel is leaking down into the manifold you probably have a blown power valve, the wrong power valve, or you put the wrong gasket on the power valve. Some carb kits come with the wrong power valve and or gasket.
edit: one other thing to be careful of is electric fuel pumps. Most electric fuel pumps put out more pressure than the old Ford carburetor can handle.
Nice looking engine picture. Please post pictures of the truck.
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Looks like from the accelerator pump. But its all around the bottom, maybe just running down. I cant really tell. Like I said in original post, it has been fine til just yesterday.
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Senior User
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Stuck needle and seat are the first thing to check. You may have un-stuck it when you removed the carb top.
If your fuel is leaking down into the manifold you probably have a blown power valve, the wrong power valve, or you put the wrong gasket on the power valve. Some carb kits come with the wrong power valve and or gasket.
edit: one other thing to be careful of is electric fuel pumps. Most electric fuel pumps put out more pressure than the old Ford carburetor can handle.
Nice looking engine picture. Please post pictures of the truck.
If your fuel is leaking down into the manifold you probably have a blown power valve, the wrong power valve, or you put the wrong gasket on the power valve. Some carb kits come with the wrong power valve and or gasket.
edit: one other thing to be careful of is electric fuel pumps. Most electric fuel pumps put out more pressure than the old Ford carburetor can handle.
Nice looking engine picture. Please post pictures of the truck.
Here you go Coupe!!It was black in 1974!! I really love this vehicle and want to get back to driving it. I will be attempting fixes and upgrades along so yall can expect ALOT of questions.
Fleet Owner
Joined: Jul 2004
Posts: 27,297
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From: NM
Welcome to the forum!
There are two settings for the float, one is fuel level, the other is float drop. Float drop is adjusted to prevent the float going down so far that the needle gets cocked and stuck open. If gas is coming out up high, it almost has to be a float issue. Some needle/seats in the kits are also garbage. And a piece of crud can get lodged in the seat and cause problems.
There are two settings for the float, one is fuel level, the other is float drop. Float drop is adjusted to prevent the float going down so far that the needle gets cocked and stuck open. If gas is coming out up high, it almost has to be a float issue. Some needle/seats in the kits are also garbage. And a piece of crud can get lodged in the seat and cause problems.
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Welcome to the forum!
There are two settings for the float, one is fuel level, the other is float drop. Float drop is adjusted to prevent the float going down so far that the needle gets cocked and stuck open. If gas is coming out up high, it almost has to be a float issue. Some needle/seats in the kits are also garbage. And a piece of crud can get lodged in the seat and cause problems.
There are two settings for the float, one is fuel level, the other is float drop. Float drop is adjusted to prevent the float going down so far that the needle gets cocked and stuck open. If gas is coming out up high, it almost has to be a float issue. Some needle/seats in the kits are also garbage. And a piece of crud can get lodged in the seat and cause problems.
Fleet Owner
Joined: Jul 2004
Posts: 27,297
Likes: 1,059
From: NM
There's a tang that hits the seat's body when the float drops, you bend it to hit early enough that the needle doesn't bind up.
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Thanks a lot!!! I will try that this afternoon!.
Logistics Pro
Joined: Oct 2002
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From: Valley Center, CA
Ross, that's a fine schematic!
As far as finding where the fuel is leaking from, I suggest using a clean white paper towel. Start dabbing at the top gasket all the way around. The paper towel will turn dark when it touches "wet." Then methodically work your way down. Leaks always flow down. Good luck, Jag
As far as finding where the fuel is leaking from, I suggest using a clean white paper towel. Start dabbing at the top gasket all the way around. The paper towel will turn dark when it touches "wet." Then methodically work your way down. Leaks always flow down. Good luck, Jag
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