fuel pump

trainguy

trainguy

Well-known member
I have a 46 Ford and a $6 Merk. that suffer from the same problem.They both have electric fuel pumps in line with the mech pump.They will run with the electric pump turned offf but sometimes when climbing hill or during hot starts the engines cut out or will not start ,if I turn the pump on the engine rune normally.Both have 94 carbs.Don,t like runnig the electric pump thru the mech due to diaphram problem and filling the crancase with fuel.Any suggestions.Thanks Phil
 
Check the cloth covered fuel line link on the firewll to make sure it isn't corroded and collapsed on the inside. You might also have a pin hole leak in the fuel pump rubber diaphragm. Check your oil to see if it smells like gasolene is present. Does your needle valve in your carb get "stuck"? Could your condensor be bad?
 
It may be that there is an impedance in the electric pump- that is, some fuel can get through, but not much... I would see if I could blow though the electric pump... off the car... Karl
 
I was thinking that also.I was thinking of putting a line around the pump with a check valve to prevent the electric pump from pumping back to the tank.Anybody know where I coud find a check valve with almost 0 spring pressure?Phil
 
This may sound a little bit out there however I was speaking to an older gentlman at a local cruise night with a similar problem on his Packard he smiled and winked at me and then showed me his fix. Belive it or not he put a primer bulb from an outboard motor fuel line in line before the pump. Says he has ran the car this way now for two years and never has had a problem. He said it also works great fror spring start up after the car has sat all winter. I will let you come to your own conclusion on this one. But he is an elder and been around the hobby along time.

Cheers
 
I had a lot of problems with flex hoses running this new gas for the past 3 or 4 years. Last year I started using the new flex hoses from Bob Shewman made out of the material used by the space program. My hose problem ended since switching. He makes 2 types, one like the stock hose and one with a check valve built in the fitting at the pump end of the hose. The hex on the fitting is about a 1/4" longer to make room for the built in valve. This valve holds the fuel in the pump not allowing it to return to the tank after the engine is shut down. Even after sitting for days the fuel is right there and the engine don't have to crank for several minutes to get gas up to the carb. I drive my old Fords more then most people and in 90 degree weather most of the time and never have a starting problem when the engine is hot or cold. I never needed and electric pump and don't like the thought of cutting the fuel line and adding the pump and two hoses in a place you can't see them. If you have an eletric pump it should have a spring loaded switch so you have to hold it on when in use. Bob can be contacted at 1-610-933-6637 or gadgiteer@aol.com his hoses are gauranteed for 5 years but should last as long as you have the car. G.M.
 
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GM ,Thanks for the phone number,I have his hoses on 2 of my cars.Maybe he will sell me the check valve to go around my elect pump.Phil
 
Your problem may be related to the installation of the electric fuel pump. The stock fuel pump may be sucking air through the connections for the electric pump. Loose connections may not leak gas, but leak air.
 
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