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Car Forum / Ford / Ford Trucks / January 2007Ford F-100 1967 fuel pump or carb problem
Hi, I have a 67 Ford pickup with a 240ci 6 cylinder. My problem is this: the truck will start and run and then die. I just put on a new old stock fuel pump and I rebuilt the 1 barrel carb before this started happening. The carb kit I got from napa did not have the correct needle for the fuel intake at the float, I rounded the one supplied down until it fit into the fuel inlet tube. This carb is a fomoco 1101. What is happening is the carb is running out of gas. I have disconnected the fuel line to the carb and the pump is pushing gas, it seems to be fine, although I haven't tried to pressure test it. I don't have a guage. I've removed the carb and blown through the fuel inlet to the bowl, this is clear. I have even left out the needle valve to make sure that wasn't the problem. Still the same results. If I let the truck sit for a couple of minutes it will start again, and then run out of gas. If I deliver gas to the throat of the carb manually it just keeps on running. I'm guessing that this has to be the fuel pump, but I'm hoping someone in the group will know for sure before I have to start replacing parts. Thanks, Jack > Hi, > I have a 67 Ford pickup with a 240ci 6 cylinder. My problem is this: [quoted text clipped - 14 lines] > someone in the group will know for sure before I have to start > replacing parts. Thanks, Jack There were two different style of carbs that year, and I would gamble the difference was more than just the needle valves. You assume the issue is fuel not getting in the bowl, when it could be no fuel flowing through the various circuits. You also didnt say whither the fuel filter had been replaced. That thing will run with 3 psi of fuel pressure, you can almost blow that hard. Crudeville autozone sells a champion rebuilt for $114, Napa has Holley remanufactured carbs from $149. When they start getting that old one of the problems is what has someone else done to it in its 40 year history. It might not even be the original carb to start with. The only way to know for sure is IF the metal tag stamped with its number is stil on the carb, and then you need to get a carb kit according to that number which be something like C6AF-AK if its a holley, or R-4526AAS if its a ford carb. Unless the truck has been in the family its entire life, you dont know if it is even the original engine. Whitelightning Hi Whitelightning, Thanks for the reply. This makes me think, maybe this isn't the original carb, it had no tag. It does have fomoco stamped into the body and it looks like the autolite 1101 in my ford manual. The fuel bowl is always empty when I remove the top of the carb, right after it shuts down. I guess that still could be the carburetor. The fuel filter I have not replaced, so I think I'll give that a try as well. I appreciate your help. Jack On Jan 6, 12:16 pm, "Whitelightning" <white.lightni...@verizon.net> wrote: > > Hi, > > I have a 67 Ford pickup with a 240ci 6 cylinder. My problem is this: [quoted text clipped - 30 lines] > > Whitelightning >Hi Whitelightning, >Thanks for the reply. This makes me think, maybe this isn't the [quoted text clipped - 42 lines] >> >> Whitelightning A new filter is always a good thing. It sounds to me the float is hanging up in the closed valved condition after the intial filling then the engine pumps the bowl empty. Check the float level setting and for problems with the float rod and rod mounting points. Thanks for the reply Samst..., I'll check those settings and pivot points. Much appreciated. On Jan 6, 3:24 pm, samst...@aol.com wrote: > >Hi Whitelightning, > >Thanks for the reply. This makes me think, maybe this isn't the [quoted text clipped - 46 lines] > setting and for problems with the float rod and rod mounting > points. > Hi, > I have a 67 Ford pickup with a 240ci 6 cylinder. My problem is this: [quoted text clipped - 14 lines] > someone in the group will know for sure before I have to start > replacing parts. Thanks, Jack Haven't worked on one of those in 20years so forgive me if I don't use all the correct terms. You say you ran it without the needle valve in the carb. Do you mean the valve controlled by the float? The symptoms you give sound like classic float failure. That is the bowl fills up, the float shuts of the fuel but then when the fuel level in the bowl begins to drop, the float is not opening the valve allowing more fuel to flow into the bowl, ergo, the engine runs out of fuel. This could be the float, the tang that operates the flow valve, or the valve itself. Good luck. DaveD |
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