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To all of you who responded to my cry for help, THANK YOU so much for =
your suggestions. As it turns out, the root cause of the problem was =
timing. The stock distributor had been upgraded several years ago to a =
Pertronix electronic module which had worked itself loose inside the =
distributor causing the timing to become erratic. Tugging on the leads =
to the coil would cause the engine to increase its RPMs and run =
smoothly. Pushing them back into the distributor reintroduced the =
backfire and coughing.=20
=20
Thanks again for everyone=E2=80=99s help.
=20
Jim
=20
From: Mgs <mgs-bounces@autox.team.net> On Behalf Of John DiFede
Sent: Sunday, April 24, 2022 7:28 AM
To: Robert Rutherford <rrutherf@ucalgary.ca>
Cc: MGB-V8@autox.team.net; MG Digest <mgs@autox.team.net>
Subject: Re: [Mgs] Coughing, spitting, and dying
=20
Sounds like a fuel problem. The Edelbrock 1404 is a simple carburetor =
to work on as it is a copy of the Carter AFB carb used since the =
60=E2=80=99s. Is your choke set properly when cold and hot? The AFB =
used a mechanical fuel pump- make sure that facet pump you=E2=80=99re =
using has the correct fuel pressure for the AFB. Also check your =
vacuum. Is the vacuum reading steady or is the gauge needle fluctuating =
back and forth? You may have a vacuum leak affecting fuel mixture. =
When the engine is cold and the choke is on you have a rich mixture =
allowing the engine to run poorly. Once the choke opens the mixture =
goes lean due to the vacuum leak possibly leading to your motor =
stalling. =20
Sent from my iPhone=20
On Apr 23, 2022, at 11:10 PM, Robert Rutherford <rrutherf@ucalgary.ca =
=EF=BB=BF Coughs, spits, dies - sounds like Covid to me.
On Apr 21, 2022, at 12:34 PM, Max Heim <mvheim@sonic.net =
=20
[=E2=96=B3EXTERNAL]
Sounds more like a carb/fuel issue to me. Can=E2=80=99t see how it would =
be electrical.
Sent from my iPad
On Apr 21, 2022, at 11:58 AM, jimray@hartcom.net =
=EF=BB=BF=20
Have an 80 MGB V8 conversion that has developed a problem I =
can=E2=80=99t get my hands around. When cold it coughs and sputters when =
first starting up and when warm will not run at idle without stalling =
after several minutes. Thinking it might be an electrical issue, I =
replaced the plugs, plug wires, distributor cap, coil, and battery. It =
has a PerTronix Ignitor module installed which I did not replace. The =
battery shows 12.7 volts on my meter. The alternator is producing 14.6 =
volts at ~1500 RPMs and 14.3 under load. Fuel is fed to an Edelbrock =
1404 carburetor via a Facet electric pump with new filters in the line =
at the pump and just before the carburetor. I use 93 octane non-ethanol =
gas. I appreciate any thoughts or suggestions you may have.
=20
Jim Ray
=20
=20
_______________________________________________
Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/mgs/mvheim@sonic.net
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http://autox.team.net/archive
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal>To all of you who responded to =
my cry for help, THANK YOU so much for your suggestions. As it turns =
out, the root cause of the problem was timing. The stock distributor had =
been upgraded several years ago to a Pertronix electronic module which =
had worked itself loose inside the distributor causing the timing to =
become erratic. Tugging on the leads to the coil would cause the engine =
to increase its RPMs and run smoothly. Pushing them back into the =
distributor reintroduced the backfire and coughing. <o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Thanks again =
for everyone=E2=80=99s help.<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Jim<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> Mgs =
<mgs-bounces@autox.team.net> <b>On Behalf Of </b>John =
DiFede<br><b>Sent:</b> Sunday, April 24, 2022 7:28 AM<br><b>To:</b> =
Robert Rutherford <rrutherf@ucalgary.ca><br><b>Cc:</b> =
MGB-V8@autox.team.net; MG Digest =
<mgs@autox.team.net><br><b>Subject:</b> Re: [Mgs] Coughing, =
spitting, and dying<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>Sounds like a fuel problem. The =
Edelbrock 1404 is a simple carburetor to work on as it is a copy of the =
Carter AFB carb used since the 60=E2=80=99s. Is your choke set =
properly when cold and hot? The AFB used a mechanical fuel pump- =
make sure that facet pump you=E2=80=99re using has the correct fuel =
pressure for the AFB. Also check your vacuum. Is the vacuum =
reading steady or is the gauge needle fluctuating back and forth? =
You may have a vacuum leak affecting fuel mixture. When the engine =
is cold and the choke is on you have a rich mixture allowing the engine =
to run poorly. Once the choke opens the mixture goes lean due to =
the vacuum leak possibly leading to your motor stalling. =
<o:p></o:p></p><div><p class=3DMsoNormal>Sent from my =
iPhone <o:p></o:p></p></div><div><p =
class=3DMsoNormal><br><br><o:p></o:p></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>On Apr 23, 2022, at 11:10 PM, Robert =
Rutherford <<a =
href=3D"mailto:rrutherf@ucalgary.ca";>rrutherf@ucalgary.ca</a>> =
wrote:<o:p></o:p></p></blockquote></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal>=EF=BB=BF Coughs, spits, dies - sounds like Covid to =
me.<o:p></o:p></p><div><p =
class=3DMsoNormal><br><br><o:p></o:p></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal>On Apr 21, 2022, at 12:34 PM, Max Heim <<a =
href=3D"mailto:mvheim@sonic.net";>mvheim@sonic.net</a>> =
wrote:<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><table =
class=3DMsoNormalTable border=3D0 cellspacing=3D0 cellpadding=3D0 =
style=3D'caret-color: rgb(0, 0, 0);orphans: auto;widows: =
auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: =
0px;word-spacing:0px'><tr><td style=3D'padding:0in 0in 0in 0in'><p =
class=3DMsoNormal style=3D'margin-bottom:7.5pt'><span =
style=3D'font-family:"Helvetica",sans-serif;color:red'>[</span><span =
style=3D'font-family:"Cambria =
Math",serif;color:red'>=E2=96=B3</span><span =
style=3D'font-family:"Helvetica",sans-serif;color:red'>EXTERNAL]<o:p></o:=
p></span></p></td></tr></table><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'><br =
style=3D'caret-color: rgb(0, 0, 0);font-variant-caps: =
normal;text-align:start;-webkit-text-stroke-width: =
0px;word-spacing:0px'><br></span><o:p></o:p></p><div><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'>Sounds more =
like a carb/fuel issue to me. Can=E2=80=99t see how it would be =
electrical.<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'>Sent from =
my iPad<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'><br><br><o:p=
></o:p></span></p><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'>On Apr 21, =
2022, at 11:58 AM,<span class=3Dapple-converted-space> </span><a =
href=3D"mailto:jimray@hartcom.net";>jimray@hartcom.net</a><span =
class=3Dapple-converted-space> </span>wrote:<o:p></o:p></span></p></=
blockquote></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p =
class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Tahoma",sans-serif'>=EF=BB=BF</span=
><span style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'> =
<o:p></o:p></span></p><div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Have an 80 MGB =
V8 conversion that has developed a problem I can=E2=80=99t get my hands =
around. When cold it coughs and sputters when first starting up and when =
warm will not run at idle without stalling after several minutes. =
Thinking it might be an electrical issue, I replaced the plugs, plug =
wires, distributor cap, coil, and battery. It has a PerTronix Ignitor =
module installed which I did not replace. The battery shows 12.7 volts =
on my meter. The alternator is producing 14.6 volts at ~1500 RPMs and =
14.3 under load. Fuel is fed to an Edelbrock 1404 carburetor via a Facet =
electric pump with new filters in the line at the pump and just before =
the carburetor. I use 93 octane non-ethanol gas. I appreciate any =
thoughts or suggestions you may have.</span><o:p></o:p></p></div><div><p =
class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'> </span><o=
:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'>Jim =
Ray</span><o:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif'> </span><o=
:p></o:p></p></div><div><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Arial",sans-serif;color:#373737'>&=
nbsp;</span><o:p></o:p></p></div><p class=3DMsoNormal><span =
style=3D'font-size:9.0pt;font-family:"Helvetica",sans-serif'>____________=
___________________________________<br><br><a =
href=3D"mailto:Mgs@autox.team.net";>Mgs@autox.team.net</a><br>Donate:<span=
class=3Dapple-converted-space> </span><a =
href=3D"http://www.team.net/donate.html";>http://www.team.net/donate.html<=
/a><br>Suggested annual donation $12.75<br><br>Archive:<span =
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n></p></div></blockquote></div><p class=3DMsoNormal><span =
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