| TonyF | -- 03-18-2019 @ 4:10 AM |
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Have a 49 Ford f1, flathead 8. Getting fuel to pump but not to carb. Replaced pump still no fuel to carb. I’m figuring it’s the fuel pump rod . My question is how do u replace this with engine in truck . Thx
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| TomO | -- 03-18-2019 @ 6:32 AM |
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Replacing the push rod is simple. Remove the fuel pump stand and the baffle below it then pull the rod out. Before you do this, I would change the gasket on the sediment bowl and make sure that all connections on the input side of the pump are secure. If you have a rubber fuel line from the tank, replace it with the correct steel line and flex line. The rubber fuel lines were not made for use in the suction feed fuel system, they are made for the pressure type system, where the fuel pump is at or in the tank. A worn push rod usually shows up as fuel starving at highway speeds or on turns. It can be worn significantly and still deliver enough fuel to drive the truck at city speeds. Tom
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| ken ct. | -- 03-18-2019 @ 8:51 AM |
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Their is no baffle tube under the stand on post yrs 8BA and newer. Only on 48 and earlier pass and 47 trucks. I have a nicely restored single action pump if you need one.Personally I don't think its the rod but the pump . ken ct IGADORE@SBCGLOBAL.NET or 1-203-260-9780 Rods have hardened ends on them ,will take a lot of miles before unsuitable for use. OMO Would be nice if we knew where you were !!
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| TonyF | -- 03-18-2019 @ 9:51 AM |
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It ran for the first day I bought it then only was getting gas to pump, replaced with new pump this weekend and same results. And it does have rubber line to tank . Thx
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| ken ct. | -- 03-18-2019 @ 12:43 PM |
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Is it rubber from tank to FP all the way ??? ken ct. New pumps for the past couple of yrs all made in China. Have poor rubber diaphrams and vaves. Sounds like you have NOT a 34 FP on there. 34,35,anearly 36 pumps measure 2" across bowl with the top cover off.It is a unique pump to those yrs. 37 up pumps measure 2 1/4" across with out cover. Sounds like you have a glass bowl later one on there going by your description of the valves. they are pressed in and cannot be replaced. ken ct.
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| pauls39coupe | -- 03-18-2019 @ 5:56 PM |
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Try taking the line off at the carb, then crank the engine with the starter to see if you are getting fuel out of the pump. Use caution and have someone with catch can to hold the fuel. You may have a stuck or plugged inlet valve or a carburator float that is hung up. We have had good luck with Bob Drake's fuel pumps, and they seem to hold up to E-10 fuel. If you are not getting fuel out of the pump, be sure the line to the tank is not plugged or broken. The flex line going to the pump is another source of trouble as they harden and will draw air around the brass fittings rather than pulling fuel.
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| TonyF | -- 03-19-2019 @ 5:11 AM |
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I have line off at carb and it pulls gas from tank and fills bowl with gas but doesn’t pump fuel out yo carb. It is the 49-50 pump
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| TonyF | -- 03-19-2019 @ 5:20 AM |
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Pump is from Speedway, metal line to rubber line from tank
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| TomO | -- 03-19-2019 @ 7:14 AM |
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Tony, A more detailed description of your problem would help. I suggest that you do the fuel delivery test in the post that this link takes you to and then post the results. https://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=16&Topic=7440&keywords=fuel%20delivery The test results will help us understand your problem better. We will need the actual amount of fuel that the pump delivered in the test, to give you help. Tom
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| TonyF | -- 03-19-2019 @ 6:31 PM |
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I’ve preformed this test last week. , test results are zero gas coming from both pumps that I have had on truck. Both pumps are getting gas from tank but not to carb. Notta, nothing. I’ll feed carb with bottle to keep engine running with line disconnected to carb and nothing comes out but is getting fuel to pump from tank .
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| Greg58 | -- 03-20-2019 @ 3:15 AM |
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Have you tried pumping either pump by hand? I tested mine by connecting it back to the line from the tank and moving the arm by hand, don't push the arm very far on each stroke or you might damage the pump. If you remove the pump take a screw driver and push down on the pump rod with engine running on your bottle and see how much the rod moves up and down. I've heard of two different type pumps, my 50 uses the one with the cup on the arm. Greg
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| 37RAGTOPMAN | -- 03-20-2019 @ 7:43 AM |
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hi What I am reading here, is you get fuel from the tank to the fuel pump,right engine runs when you use a separate fuel supply ...right is this pouring gas down the carb ? with air cleaner removed ? or using a fuel line connected to the carb, ? you might have a float problem in stuck up position it might be the line from pump to carb is clogged ? any kinks, blow it out, to be sure !! I have seen bees, built nests, out of clay, in fuel line inlets, in the pump and carb inlets, is the air cleaner clean, no obstructions,? get back to us with more, hope this helps 37RAGTOPMAN
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| TomO | -- 03-20-2019 @ 8:48 AM |
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It sounds like you may have a vacuum leak in the supply side to the fuel pump and it most likely is the sediment bowl gasket. Your pump can suck enough gas from the tank to almost fill the bowl, but not enough to bring it into the pump. Check the sediment bowl gasket on the fuel pump for cracks or signs that it was over-tightened, the bowl thumbscrew should be finger tight, over-tightening can warp the bowl seat and ruin the gasket. If a new gasket doesn't solve the problem, try some of the following stuff. Replace the flex line from the tank line to the fuel pump (it may have a small vacuum leak) Use the correct flex line for your vehicle, do not use fuel line with hose clamps, they usually leak vacuum or can collapse when vacuum is applied. Check that the screws that hold the diaphragm are tight, , check the line from the tank for blockage, check the fitting at the tank for tightness. Use a vacuum gauge to check out the fuel pump and the lines to the tank: 1) Disconnect the fuel line at the pump and install a short piece of fuel line so the vacuum gauge can be connected to the input of the fuel pump. Connect the gauge to the pump input. 2) Fill the carburetor bowl with gas (I use the bowl vent tube in the top of the carburetor to do this) 3) Start the engine and read the vacuum gauge, it should read at least 6 inches of mercury. If it does not, check for the following conditions, leaking sediment bowl, stretched or loose diaphragm or a worn push rod. The push rod should put pressure on the pump arm when you try to install it and the rod should move about 1/4" from the bottom to the top of the stroke. 4) If the pump passed the vacuum test, reconnect the fuel lines to the pump. 5) Disconnect the fuel line at the tank and connect the vacuum gauge to the line. 6) Run the engine and read the vacuum gauge, it should read the same as the reading at the fuel pump. If it does not, there is a vacuum leak in the line to the pump, most likely in the flex line. Tom
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