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<div dir="ltr" data-setdir="false"><div><div dir="ltr" data-setdir="false">After a cursory inspection today I
found a non SU type electric pump. Looks like a large Facet type, but I
can't be sure. I also found that there are no filters anywhere between
the tank to the Weber. I removed the cylindrical mesh filter in the
Weber and it was absolutely clean. So I started it up cold and for the
first time right after start it idled a little over 500 rpm. Usually
with the jets (probably wrong ones) in the Weber startups have not been
under 1000 rpm at idle in the past. The pump was clicking away as
normal. It has rubber type fuel hose on either side of the pump which
should not present a problem. Don't want to, but might have to drop the
fuel tank and have a look see.<br></div>Mike MacLean</div><div><br></div></div><div><br></div>
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On Monday, January 11, 2021, 12:30:08 AM PST, PaulHunt73 <paulhunt73@virginmedia.com> wrote:
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<div><font size="2">Could be several things, but unless it was pumping fuel onto
the ground it's more likely to be associated with the pump itself.</font></div>
<div><font size="2"></font> </div>
<div><font size="2">An air leak on the suction side is unlikely to seal itself
again, for more than a couple of minutes anyway. A blockage does allow the
pump to pump more rapidly than when pumping fuel, but not as rapidly as
when it's not pumping fuel for other reasons e.g. valve stuck open or
pumping air.</font></div>
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<div><font size="2">As the idle dropped, and only cut out a minute or so later,
the implication is that the fuel supply was greatly reduced, not cut off
altogether at the outset.</font></div>
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<div><font size="2">It could be the one-way valve in the pump inlet allowing fuel
to be pushed back towards the tank instead of the carbs, possibly dirt although
there should be filters there - in an original SU anyway.</font></div>
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<div><font size="2">A delivery check is the thing to do, remove a pipe from a
carb, direct it into a container and turn on the ignition. It should
deliver a minimum of one Imperial pint per minute, and in practice double that,
in a continuous stream of pulses with minimal bubbling. Bubbling
especially variable implies a suction side air leak, without that hesitation
with the pump speeding up implies the valve is not sealing.</font></div>
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<div><font size="2">PaulH.</font></div>
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<div style="FONT:10pt arial;">----- Original Message ----- </div>
<div style="FONT:10pt arial;BACKGROUND:#e4e4e4;"><b>...</b></div>
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<div dir="ltr">The fuel pump on my 69 GT started pumping
furiously like I was running out of gas while stopped halfway through the
line. The car was still running. I got up to the first window to
pay and the idle dropped to less than 500 rpm. In a minute or so later
the engine just quit. There is over a half tank of gas in the car.
I tried starting it several times, but it would just fire and die. After
several attempts the car started again, all the while the fuel pump was going
like mad. After getting out of the line the fuel pump slowed down like
normal and you did not hear it after what I assume was a full float
bowl. No issues going home the 4 or 5 miles. Does that sound like
my fuel pump is going out or the tank pickup is
clogged?</div></div></blockquote></div>
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