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Discussion Topic:
1949 fuel pump rod problem flathead 8
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TonyF |
03-18-2019 @ 4:10 AM
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Member
Posts: 5
Joined: Mar 2019
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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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Senior
Posts: 7250
Joined: Oct 2009
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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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Senior
Posts: 1513
Joined: Jan 2010
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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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Member
Posts: 5
Joined: Mar 2019
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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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Senior
Posts: 1513
Joined: Jan 2010
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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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Member
Posts: 205
Joined: Jul 2014
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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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Member
Posts: 5
Joined: Mar 2019
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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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Member
Posts: 5
Joined: Mar 2019
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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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Senior
Posts: 7250
Joined: Oct 2009
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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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Member
Posts: 5
Joined: Mar 2019
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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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