So after a day of working on the engine, (carb and valve adjustment) got
the carb sorted out , the metering block for the secondaries was loose
inside the bowl causing fuel to drip on to the throttle plate.1 down now on
to the accelerator pump, I removed the Philips screw that holds the nozzle
for the A pump and looked down at the needle valve inside and found a shard
of diecast jamming the needle, tried picking it out to no avail , so I got
the air gun and gave a quick blast straight down at the needle and it
popped out and down on to the throttle plate. fished it out with needle
nose, then gave a pump and a lovely fountain came up, replaced the nozzle
all fixed!
On Fri, May 30, 2014 at 11:58 PM, Tom Parker <tkparker1941@gmail.com> wrote:
> Jay,
>
> I'm certainly not an expert... I had a Holley fuel pump on the Kitty with a
> fuel filter before the pump; the pump stopped working, so I removed the
> filter and it worked fine (but it was loud, so I replaced it with the old
> Bendix...). Fuel pressure if I recall correctly is @ 3 to 5 lbs. This from
> Holly on the 4160, as I remember it. Anyhow, 5 PSI should be fine.
>
> Maybe timing, or a loose vacuum line to the distributor? If the motor runs
> o.k. at speed and accelerates o.k. it probably isn't fuel pressure related.
> (but it could be a carb adjustment...)
>
> Tom
> '67 Mark 2
>
>
> On Fri, May 30, 2014 at 3:41 PM, Jay Laifman <jay.laifman@gmail.com>
> wrote:
>
> > I rebuilt the stock pump and it was working fine. It failed. I grabbed
> a
> > new
> > Carter vane type pump I happened to have from another car and threw it
> in.
> > It
> > worked for a short while then failed. Then I grabbed one last Facet
> pump I
> > happened to have. It is working, and still working. But the car is now
> > not
> > running perfectly. I don't know if it is related to the fuel pump. But
> > I've
> > only noticed it since I change fuel pumps - and changed the spark plugs
> and
> > wires.
> >
> > I put a fuel pressure gauge on and found that this pump is putting out
> 4.25
> > psi. I've looked around and have seen that 5.5-6 psi is suggested - but
> I
> > can't confirm if that is correct for a 260 with a Holley.
> >
> > The problem I'm having is that I'm getting a little stumble on initial
> > acceleration and I've noticed when I take my foot off the gas, like to
> > shift
> > up, the rpm drops all the way to 0, but does catch up again.
> >
> > One thought was that this fuel pump doesn't have enough volume for the
> > carb/engine - or different enough volume that the float bowl is not at
> the
> > same level as it was with the old pump. But I don't know if that make
> > sense.
> >
> > Another thought was that the accelerator pump is not putting out enough
> > fuel.
> > But, I haven't changed the accelerator pump and that wouldn't explain the
> > far
> > drop to 0 when lifting off the gas. Although I don't know for sure if
> the
> > two
> > are related.
> >
> > Thanks for any thoughts.
> > _______________________________________________
> >
> > tigers@autox.team.net
> >
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>
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>
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