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Old 07-13-2019, 06:16 AM   #1
Peter in NH
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Default Continued Model B Problem

Have corrected my incorrectly wired coil problem and now have a good spark at
the distributor. However, another problem has surfaced that I've never had to
the degree it is. Namely, a fuel problem. I don't start my coupe often enough
and, invariably when I do I experience the normal fuel line bleed down problem
as most of us do with our V8's. So What I usually do to rectify the problem is
temporarily remove the fuel pump and work it by had to bring the gas forward
in the line to the engine. As a rule after I've done this and reinstall the pump
she'll fire right up for me. This time it's a no go. It's like the cam lobe is worn
down to nothing which isn't possible as this is a completely rebuilt engine with
very little mileage on it. I've tried two different pumps both of which have been
rebuilt no no avail. Yesterday I temporarily pulled my carb and took it apart. The
bowl was as dry as an old bone. The only thing I can think of that could be
creating this weird problem is too much wear on the pump arms which means
the diaphragms aren't being activated enough? What else might it be?

Peter
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Old 07-13-2019, 06:29 AM   #2
35fordtn
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Default Re: Continued Model B Problem

Peter, by hand does the pump put out excellent suction? Again not pressure but suction. If the top cover cork gasket shrinks any from sitting, they will put out pressure (or at least feel so) but not have any suction. The 32 pumps have such a thin cork gasket that this seems to be the problem I’ve seen a lot including one just last week.
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Old 07-13-2019, 06:31 AM   #3
KiWinUS
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Default Re: Continued Model B Problem

Check that the pump top cover gasket hasn't dried out causing top cap to sit on fuel line casting boss , bolt feels tight but it is sucking air.
Good Luck
Cheers
Tony


LOL , I,m too slow typing Michael has a similar answer
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Old 07-13-2019, 06:50 AM   #4
Terry,OH
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Default Re: Continued Model B Problem

When the early style pump, with a top cover, sit and dry out that top gasket shrinks. I wrap a couple of turns of electrical tape around the gasket area and they start to pump. Once wet the cork will expand and you can remove the tape.
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Old 07-13-2019, 07:16 AM   #5
DavidG
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Default Re: Continued Model B Problem

I usually use two rather than one cap gaskets. Are you confident that the line from the tank isn't blocked?
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Old 07-13-2019, 07:50 AM   #6
Pat/Ohio
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Default Re: Continued Model B Problem

I have also removed a couple of spark plugs and shot a little gas into the chamber to prime it. Once it starts...it would usually keep running. Probably should have checked the bowl gaskets as recommended above.
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Old 07-13-2019, 08:28 AM   #7
Peter in NH
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Default Re: Continued Model B Problem

Didn't try checking out cover gaskets yesterday. Will do that today and perhaps try Dave's
method of doubling up.
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Old 07-13-2019, 09:48 AM   #8
redmodelt
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Default Re: Continued Model B Problem

Also;
Depending on when and if the pump has been rebuilt. The diaphragm could be going to pot. The old fabric rubber type, A just gets old and B don't like todays fuels, the rubber breaks down. Also the check valves might be worn or sticking. Might be time to pull the pump for some service work on it.
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Old 07-13-2019, 03:11 PM   #9
1931 flamingo
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Default Re: Continued Model B Problem

Try Renner's Corner for a new diaphram and/or pump.
Paul in CT
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