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After a cursory inspection today I found a non SU type electric pump.=C2=
=A0 Looks like a large Facet type, but I can't be sure.=C2=A0 I also found =
that there are no filters anywhere between the tank to the Weber.=C2=A0 I r=
emoved the cylindrical mesh filter in the Weber and it was absolutely clean=
.=C2=A0 So I started it up cold and for the first time right after start it=
idled a little over 500 rpm.=C2=A0 Usually with the jets (probably wrong o=
nes) in the Weber startups have not been under 1000 rpm at idle in the past=
.=C2=A0 The pump was clicking away as normal.=C2=A0 It has rubber type fuel=
hose on either side of the pump which should not present a problem.=C2=A0 =
Don't want to, but might have to drop the fuel tank and have a look see.
Mike MacLean
On Monday, January 11, 2021, 12:30:08 AM PST, PaulHunt73 <paulhunt73@vi=
rginmedia.com> wrote: =20
=20
Could be several things, but unless it was pumping fuel onto the ground i=
t's more likely to be associated with the pump itself.=C2=A0An air leak on =
the suction side is unlikely to seal itself again, for more than a couple o=
f minutes anyway.=C2=A0 A blockage does allow the pump to pump more rapidly=
than when pumping fuel,=C2=A0but not as rapidly as when it's not pumping=
=C2=A0fuel for other reasons=C2=A0e.g. valve stuck open or pumping air.=C2=
=A0As the idle dropped, and only cut out a minute or so later, the implicat=
ion is that the fuel supply was greatly reduced, not cut off altogether at =
the outset.=C2=A0It could be the one-way valve in the pump inlet allowing f=
uel to be pushed back towards the tank instead of the carbs, possibly dirt =
although there should be filters there - in an original SU anyway.=C2=A0A d=
elivery check is the thing to do, remove a pipe from a carb, direct it into=
a container and turn on the ignition.=C2=A0 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.=C2=A0 Bubbling especially variable=
implies a suction side air leak, without that hesitation with the pump spe=
eding up implies the valve is not sealing.=C2=A0PaulH.=C2=A0=C2=A0
----- Original Message ----- ... The fuel pump on my 69 GT started pumpi=
ng furiously like I was running out of gas while stopped halfway through th=
e line.=C2=A0 The car was still running.=C2=A0 I got up to the first window=
to pay and the idle dropped to less than 500 rpm.=C2=A0 In a minute or so =
later the engine just quit.=C2=A0 There is over a half tank of gas in the c=
ar.=C2=A0 I tried starting it several times, but it would just fire and die=
.=C2=A0 After several attempts the car started again, all the while the fue=
l pump was going like mad.=C2=A0 After getting out of the line the fuel pum=
p slowed down like normal and you did not hear it after what I assume was a=
full float bowl.=C2=A0 No issues going home the 4 or 5 miles.=C2=A0 Does t=
hat sound like my fuel pump is going out or the tank pickup is clogged?
=20
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<html><head></head><body><div class="ydpd30afafyahoo-style-wrap"
style="font-family:times new roman, new york, times,
serif;font-size:16px;"><div></div>
<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>
</div><div id="yahoo_quoted_1389178209" class="yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial,
sans-serif;font-size:13px;color:#26282a;">
<div>
On Monday, January 11, 2021, 12:30:08 AM PST, PaulHunt73
<paulhunt73@virginmedia.com> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id="yiv1084069196">
<style></style>
<div>
<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>
<div><font size="2"></font> </div>
<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>
<div><font size="2"></font> </div>
<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>
<div><font size="2"></font> </div>
<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>
<div><font size="2"></font> </div>
<div><font size="2">PaulH.</font></div>
<div><font size="2"></font> </div>
<div><font size="2"></font> </div>
<blockquote style="BORDER-LEFT:#000000 2px
solid;PADDING-LEFT:5px;PADDING-RIGHT:0px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px;">
<div style="FONT:10pt arial;">----- Original Message ----- </div>
<div style="FONT:10pt arial;BACKGROUND:#e4e4e4;"><b>...</b></div>
<div style="FONT-FAMILY:times new roman, new york, times,
serif;FONT-SIZE:16px;" class="yiv1084069196yahoo-style-wrap">
<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>
</div></div>
</div>
</div></body></html>
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