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Hi Mike,
Furious pumping as you describe it sounds like an air leak on suction sid=
e of the pump to me. It would not be audible when you were driving.
If the tank pick-up is clogged, I do not believe the pump would be able t=
o work quickly, if at all. =20
You could try to simulate the condition at In N Out by disconnecting fuel l=
ine at the carb connection and pumping a couple of quarts into a container. =
It should show a steady pump,pump,pump with no air bubbles. As the pump i=
s cooled by fuel passing through it, this test will not harm the pump.
Bob
> On Jan 10, 2021, at 4:32 PM, Michael MacLean <rrengineer.mike@att.net> wro=
te:
>=20
> I went to In N Out for lunch today. The line was very long so I had to in=
ch forward and was stopped numerous times for a few minutes in between. The=
fuel pump on my 69 GT started pumping furiously like I was running out of g=
as while stopped halfway through the line. The car was still running. I go=
t up to the first window to pay and the idle dropped to less than 500 rpm. I=
n a minute or so later the engine just quit. There is over a half tank of g=
as in the car. I tried starting it several times, but it would just fire an=
d 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 slowe=
d down like normal and you did not hear it after what I assume was a full fl=
oat bowl. No issues going home the 4 or 5 miles. Does that sound like my f=
uel pump is going out or the tank pickup is clogged?
> Mike MacLean
> 1969 MGB GT
> 1960 Bugeye
> 1956 Austin Healey BN2
> _______________________________________________
>=20
> Mgs@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
>=20
> Unsubscribe: http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">Hi M=
ike,</div><div dir=3D"ltr"> Furious pumping as you describe it s=
ounds like an air leak on suction side of the pump to me. It would not=
be audible when you were driving.</div><div dir=3D"ltr"> If the=
tank pick-up is clogged, I do not believe the pump would be able to work qu=
ickly, if at all. </div><div dir=3D"ltr"> You could try to simul=
ate the condition at In N Out by disconnecting fuel line at the carb connect=
ion and pumping a couple of quarts into a container. It should show a s=
teady pump,pump,pump with no air bubbles. As the pump is cooled=
by fuel passing through it, this test will not harm the pump.</div><div dir=
=3D"ltr">Bob</div><div dir=3D"ltr"><br></div><div dir=3D"ltr"><br>On Jan 10,=
2021, at 4:32 PM, Michael MacLean <<a href=3D"mailto:rrengineer.mike@att=
.net">rrengineer.mike@att.net</a>> wrote:<br><br></div><blockquote type=3D=
"cite"><div dir=3D"ltr"><div class=3D"yahoo-style-wrap" style=3D"font-family=
:times new roman, new york, times, serif;font-size:16px;"><div dir=3D"ltr" d=
ata-setdir=3D"false">I went to In N Out for lunch today. The line was v=
ery long so I had to inch forward and was stopped numerous times for a few m=
inutes in between. 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 th=
e idle dropped to less than 500 rpm. In a minute or so later the engin=
e just quit. There is over a half tank of gas in the car. I trie=
d starting it several times, but it would just fire and die. After sev=
eral attempts the car started again, all the while the fuel pump was going l=
ike mad. After getting out of the line the fuel pump slowed down like n=
ormal and you did not hear it after what I assume was a full float bowl.&nbs=
p; 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 dir=3D"ltr" data=
-setdir=3D"false">Mike MacLean</div><div dir=3D"ltr" data-setdir=3D"false">1=
969 MGB GT</div><div dir=3D"ltr" data-setdir=3D"false">1960 Bugeye</div><div=
dir=3D"ltr" data-setdir=3D"false"> 1956 Austin Healey BN2<br></div></d=
iv></div></blockquote><blockquote type=3D"cite"><div dir=3D"ltr"><span>_____=
__________________________________________</span><br><span></span><br><span>=
<a href=3D"mailto:Mgs@autox.team.net";>Mgs@autox.team.net</a></span><br><span=
>Donate: <a href=3D"http://www.team.net/donate.html";>http://www.team.net/don=
ate.html</a></span><br><span>Suggested annual donation $12.75</span><b=
r><span></span><br><span>Archive: <a href=3D"http://www.team.net/pipermail/m=
gs">http://www.team.net/pipermail/mgs</a> <a href=3D"http://autox.team.net/a=
rchive">http://autox.team.net/archive</a></span><br><span></span><br><span>U=
nsubscribe: <a href=3D"http://autox.team.net/mailman/options/mgs/mgbobh@gmai=
l.com">http://autox.team.net/mailman/options/mgs/mgbobh@gmail.com</a></span>=
<br></div></blockquote></body></html>=
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