When you tested the fuel pump of the engine was the line to the
carb connected to the pump? Did you try the pumps on the engine
with the line to the carb disconnected? I'm thinking the line
might be plugged or the carb needle valve is plugged.
Manfred
Date: Sat, 14 Apr 2012 15:07:45 -0700
From: "Jerry Herrman" <jer...@san.rr.com>
Subject: [MBZ] Fuel Pump Not Delivering
Anyone out there with experience as an engine mechanic involving
an older Ford 390 engine, specifically the fuel pump?
This is on a '72 F250 I'm gonna get ready to sell. Last week when
it would not start, I disconnected the fuel line where it enters
the carburetor and found that the (mechanical) fuel pump was not
delivering gasoline to the carburetor. Knowing that the fuel pump
has been in there since at least 1978 when I bought it, and
possibly since new in 1972, I was suspicious that it had failed.
I bought a new (Carter) at Pep Boys and removed the old one
(which involved disconnecting the power steering assembly and
moving it aside). I then installed the new fuel pump and was
disappointed to find that it did not move the fuel either. I then
attached a fuel line to a container of gas and turned over the
engine with the starter. The new fuel pump would not suck up the gas.
I then removed the new pump and tested it by running the fuel
line into the container and moving the lever by hand. It sucked
up the fuel readily.
Then I hooked up the old pump to the fuel line and tested it by
hand. Lo and behold, it also sucked up the fuel just fine. This
told me that my old pump was still working. I reinstalled the old
pump and hooked it up to the container. It would not suck it up.
Jerry
82 240D
72 Ford F250
and others
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