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Bob's advice includes some excellent tips but one problem that I have
encountered numerous times that causes the idle speed of a car with SU
carbs to decrease until the engine stops is leakage of the float chamber
needle valves.
Oddly these valves will frequently only leak when the engine is actually
running as there is no overflow from the float chambers when the ignition
is left on with the engine not running.
I have discovered that if you quickly remove the carb dampers and needles
as soon as the engine stops fuel will be found to be leaking out of the
main jet.
I suspect that engine vibration causes the needle valves to leak sometimes.
In the past I used to solve the problem by installing the type of needle
valve with the synthetic rubber tips but those are hard to find these days.
Michael S
BN1 #174
On Thu, Sep 29, 2016 at 8:11 PM, Gil Rockwell <gilrockwell@gmail.com> wrote=
:
> I=E2=80=99ve used WD-40 in the past to find intake leaks with great succe=
ss.
> Safer than brake cleaner or brake fluid=E2=80=A6.
>
>
>
>
>
> *From:* Healeys [mailto:healeys-bounces@autox.team.net] *On Behalf Of *i
> erbs
> *Sent:* Thursday, September 29, 2016 1:40 PM
> *To:* Bob Spidell
> *Cc:* healeys
> *Subject:* Re: [Healeys] car dies at idle
>
>
>
> sorry meant to say brake cleaner. Dot 5 strips paint.
>
>
> Ira Erbs
>
> Portland,OR
>
> _______ _______
> (______ \____1959 BN4____/ _______)
> (_________________________)
>
> BT7 engine and disk brakes
>
>
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oa-2270-b> Virus-free.
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--=20
*If you can't fix it with a hammer, you've got an electrical problem.*
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif;font-size:small">Bob's advice includes some excellent =
tips but one problem that I have encountered numerous times that causes the=
idle speed of a car with SU carbs to decrease until the engine stops is le=
akage of the float chamber needle valves.<br></div><div class=3D"gmail_defa=
ult" style=3D"font-family:comic sans ms,sans-serif;font-size:small">Oddly t=
hese valves will frequently only leak when the engine is actually running a=
s there is no overflow from the float chambers when the ignition is left on=
with the engine not running.<br></div><div class=3D"gmail_default" style=
=3D"font-family:comic sans ms,sans-serif;font-size:small">I have discovered=
that if you quickly remove the carb dampers and needles as soon as the eng=
ine stops fuel will be found to be leaking out of the main jet. <br></div><=
div class=3D"gmail_default" style=3D"font-family:comic sans ms,sans-serif;f=
ont-size:small">I suspect that engine vibration causes the needle valves to=
leak sometimes. <br></div><div class=3D"gmail_default" style=3D"font-famil=
y:comic sans ms,sans-serif;font-size:small">In the past I used to solve the=
problem by installing the type of needle valve with the synthetic rubber t=
ips but those are hard to find these days.<br><br></div><div class=3D"gmail=
_default" style=3D"font-family:comic sans ms,sans-serif;font-size:small">Mi=
chael S<br></div><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif;font-size:small">BN1 #174 <br></div></div><div class=3D"gm=
ail_extra"><br><div class=3D"gmail_quote">On Thu, Sep 29, 2016 at 8:11 PM, =
Gil Rockwell <span dir=3D"ltr"><<a href=3D"mailto:gilrockwell@gmail.com"=
target=3D"_blank">gilrockwell@gmail.com</a>></span> wrote:<br><blockquo=
te class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so=
lid;padding-left:1ex"><div link=3D"blue" vlink=3D"purple" lang=3D"EN-US"><d=
iv class=3D"m_5602261947938735076WordSection1"><p class=3D"MsoNormal"><span=
style=3D"font-size:11.0pt;font-family:"Calibri","sans-serif=
";color:#1f497d">I=E2=80=99ve used WD-40 in the past to find intake le=
aks with great success.=C2=A0 Safer than brake cleaner or brake fluid=E2=80=
=A6.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"font-siz=
e:11.0pt;font-family:"Calibri","sans-serif";color:#1f49=
7d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"fo=
nt-size:11.0pt;font-family:"Calibri","sans-serif";color=
:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><b><span st=
yle=3D"font-size:10.0pt;font-family:"Tahoma","sans-serif&quo=
t;">From:</span></b><span style=3D"font-size:10.0pt;font-family:"Tahom=
a","sans-serif""> Healeys [mailto:<a href=3D"mailto:healeys-=
bounces@autox.team.net" target=3D"_blank">healeys-bounces@autox.<wbr>team.n=
et</a>] <b>On Behalf Of </b>i erbs<br><b>Sent:</b> Thursday, September 29, =
2016 1:40 PM<br><b>To:</b> Bob Spidell<br><b>Cc:</b> healeys<br><b>Subject:=
</b> Re: [Healeys] car dies at idle<u></u><u></u></span></p><span class=3D"=
"><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><p class=3D"MsoNormal=
">sorry meant to say brake cleaner. Dot 5 strips paint.<u></u><u></u></p></=
div><div><p class=3D"MsoNormal"><br clear=3D"all"><u></u><u></u></p><div><d=
iv><div><div><div><div><div><div><div><div><p class=3D"MsoNormal">Ira Erbs<=
u></u><u></u></p><div><p class=3D"MsoNormal">Portland,OR<u></u><u></u></p><=
/div><div><p class=3D"MsoNormal">=C2=A0 =C2=A0 =C2=A0 _______ =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0_______<br>=C2=A0 =C2=A0=C2=A0 (______ \____=
1959 BN4____/ _______)<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0 (______________=
___________)<u></u><u></u></p></div><div><p class=3D"MsoNormal">=C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 BT7 engine and disk brakes<u></u><u></u></p></div>=
</div></div></div></div></div></div></div></div></div></div></div></span></=
div><br>
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<br>
<br></blockquote></div><br><br clear=3D"all"><br>-- <br><div class=3D"gmail=
_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div><div d=
ir=3D"ltr"><i><font size=3D"2"><span style=3D"color:black">If you can't=
fix it with a hammer, you've got an electrical problem.</span></font><=
/i><br><br><div></div><div></div><div></div></div></div></div></div>
</div>
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