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Another problem that
came to mind while re reading this is that the Diaphragm in the fuel pump could
be broken allowing fuel to leak into the crankcase.
John
----- Original Message -----
Sent: Wednesday, September 05, 2007 11:06
AM
Subject: Re: [FWDLK] Carburetor / fuel
Problems
I don't know how you
determined that all the fuel drained back into the tank after your car sits a
few days but I think it is unlikely that it is happening, I have heard of
Carburetors percolating the float chambers dry from heat but that would only
seem to affect the carbs while the engine was hot. Have you tried loosening
the fuel line at the fuel pump that goes to the carb to see if any fuel leaks
out after the car has sat long enough to have a problem starting? The one
thing I can think of that might cause the fuel lines to bleed down is leaking
check valves in the fuel pump allowing fuel to leak through the fuel pump and
back to the tank, they are just spring loaded poppet valves with phenolic disc
that seals the diaphragm chamber when it isn't activated to allow fuel to flow
by the diaphragm movement, I believe there are two inlet and two outlet valves
but there might just be one for each function, it's been a long time since I
had one apart.
John
----- Original Message -----
Sent: Wednesday, September 05, 2007
10:07 AM
Subject: [FWDLK] Carburetor / fuel
Problems
While on the carburetor topic, I have a problem that I could use some
help with on my New Yorker (440 engine-Carter 4 barrel). It generally starts
and runs good but if I let it sit for more than a couple days, it has to
pump fuel all the way up from the tank. When this happens
I generally just pour gas down the carb to prime it.
What would cause the entire carburetor, fuel pump and all the
lines to drain? Is this some sort of siphon problem? and is it from the
tank or motor? There are no leaks anywhere that I have found. I have
considered getting an inline filter with a check valve but I would really
like to find out the cause of the problem rather than just temporary fixes.
Any suggestions would be appreciated.
Thanks,
Don Roberts
KC, KS
1958 Imperial x4
1967 New Yorker
----- Original Message -----
Sent: Tuesday, September 04, 2007
10:58 PM
Subject: Re: [FWDLK] Carburetor
Problems
With the engine off take off your air
cleaner and look down the throat
of the carburetor and manually open
the throttle with the linkage and see if
there is a stream of fuel
shooting into the throat of the carburetor, if
not, you need to change
the cup on the accelerator pump or spread it so it
works properly,
that will probably cure your problem.
John
----- Original Message
-----
From: "Ron Waters" <ronbo97@xxxxxxxxxxx>
To:
<L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent:
Tuesday, September 04, 2007 8:51 PM
Subject: [FWDLK] Carburetor
Problems
> Hi Gang -
>
> Carburetors baffle me.
The shop manual is so riddled with techno-speak
> that
> I've
read the carb section about five times and still don't understand
the
> five systems discussed. Here's the problem I'm hoping someone
out there
> can
> help me with:
>
> My
Newark-built 58 Plymouth has a Stromberg 2bbl carb. Car starts and
> idles
> great. While in Neutral, I can step on the gas and
rev the engine just
> fine.
> The problem is, once the car is
allowed to warm up, when I put it in gear
> and step on the gas, it
stumbles and usually stalls. This necessitates a
> restart, which is
difficult. The engine just cranks.
>
> OK, carb detectives,
help me solve this mystery.
>
> Thanks,
>
>
Ron
>
>
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