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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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