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Excellent suggestions Jim, thank you.
M
On Wed., Sep. 28, 2022, 7:22 p.m. Rjhco, <rjhco459@gmail.com> wrote:
> It is not fuel. It is an intermittent ground. Check the ground wire
> inside of the distributor and on the coil. If no luck, replace high tensi=
on
> from coil to distributor.
> Also, check ground from engine to chassis. Do you have woven wire
> ground? They rust internally.
> Best regards,
> Jim
>
> On Sep 28, 2022, at 5:35 PM, Michael Salter <michaelsalter@gmail.com>
> wrote:
>
> =EF=BB=BF
>
> This problem has plagued me for over 1000 miles.
>
> Today I had to drive some 200 miles and this is how it went:
>
> Starting from cold I experienced a persistent and irregular misfire.
>
> Pulling the choke out made no perceivable difference.
>
> Power was not much affected and the car cruised along well in top
> overdrive with just regular periods of misfiring.
>
> Climbing slopes really made no difference, even when full throttle was
> applied for 10 - 15 seconds.
>
> Misfire continued for some 90 miles with no change when the engine was
> fully heated up.
>
> I could really do nothing to influence the rate of the misfire although i=
t
> did seem to be slightly less evident at low throttle settings.
>
> After 90 miles I stopped briefly to get fuel and upon starting off it was
> quite evident that the misfire had disappeared almost completely and
> remained that way for at least 80 miles after which it started to misfire
> just a little as I came to the end of the trip.
>
> * POSSIBLE CAUSES*
>
> 1. Plugs =E2=80=A6 not like a bad plug. The misfire seems to be more=
than 1
> cylinder and never came close to being the regular beat that 1 plug
> misfiring produces. All the plugs have a healthy brown/ grey appearance.
>
> 2. Coil =E2=80=A6 In my experience coils are very reliable but when=
they do
> fail they tend to fail as they warm up and the problem gets worse as the
> coil warms up
>
> 3. Points =E2=80=A6 a possibility but the dwell is set at exactly 60=
degrees
> and does not waver at all when the engine is running in the shop.
>
> 4. Fuel pump =E2=80=A6 if the engine was starving for fuel because o=
f a fuel
> supply issue caused by a blockage or failing pump the problem would get
> worse when the demand for fuel increased, as in climbing a hill of full
> throttle. This was absolutely not the case.
>
>
> Any ideas folks?
>
>
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<div dir=3D"auto">Excellent suggestions Jim, thank you.=C2=A0<div dir=3D"au=
to"><br></div><div dir=3D"auto">M</div></div><br><div class=3D"gmail_quote"=
><div dir=3D"ltr" class=3D"gmail_attr">On Wed., Sep. 28, 2022, 7:22 p.m. Rj=
hco, <<a href=3D"mailto:rjhco459@gmail.com";>rjhco459@gmail.com</a>> w=
rote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto">It is not f=
uel.=C2=A0 It is an intermittent ground.=C2=A0 Check the ground wire inside=
of the distributor and on the coil. If no luck, replace high tension from =
coil to distributor.<div>Also, check ground from engine to chassis.=C2=A0 D=
o you have woven wire ground?=C2=A0 They rust internally.<br><div dir=3D"lt=
r">Best regards,<div>Jim</div></div><div dir=3D"ltr"><br><blockquote type=
=3D"cite">On Sep 28, 2022, at 5:35 PM, Michael Salter <<a href=3D"mailto=
:michaelsalter@gmail.com" target=3D"_blank" rel=3D"noreferrer">michaelsalte=
r@gmail.com</a>> wrote:<br><br></blockquote></div><blockquote type=3D"ci=
te"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"ltr"><div class=3D"gmail_default"=
style=3D"font-family:arial,sans-serif;font-size:small">
<p class=3D"MsoNormal" style=3D"text-align:center;margin:0in 0in 8pt;line-h=
eight:107%;font-size:11pt;font-family:"Calibri",sans-serif" align=
=3D"center"><b><span style=3D"font-size:18pt;line-height:107%"><span></span=
></span></b></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">This problem has plague=
d me for over 1000 miles.<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">Today I had to drive so=
me 200 miles and this is how it went:<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">Starting from cold I ex=
perienced a persistent and irregular misfire.
<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">Pulling the choke out m=
ade no perceivable difference.<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">Power was not much affe=
cted and the car cruised along well
in top overdrive with just regular periods of misfiring.<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">Climbing slopes really =
made no difference, even when full
throttle was applied for 10 - 15 seconds.<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">Misfire continued for s=
ome 90 miles with no change when the
engine was fully heated up.<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">I could really do nothi=
ng to influence the rate of the
misfire although it did seem to be slightly less evident at low throttle
settings.<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif">After 90 miles I stoppe=
d briefly to get fuel and upon
starting off it was quite evident that the misfire had disappeared almost c=
ompletely
and remained that way for at least 80 miles after which it started to misfi=
re
just a little as I came to the end of the trip.<span></span></p>
<p class=3D"MsoNormal" style=3D"margin:0in 0in 8pt;line-height:107%;font-si=
ze:11pt;font-family:"Calibri",sans-serif"><u><span>=C2=A0</span>P=
OSSIBLE CAUSES</u><span></span></p>
<p style=3D"margin:0in 0in 0in 0.5in;line-height:107%;font-size:11pt;font-f=
amily:"Calibri",sans-serif"><span><span>1.<span style=3D"font:7pt=
"Times New Roman"">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span>Plugs =E2=80=A6 not like a bad plug. The misfire seems
to be more than 1 cylinder and never came close to being the regular beat t=
hat 1
plug misfiring produces. All the plugs have a healthy brown/ grey appearanc=
e.<span></span></p>
<p style=3D"margin:0in 0in 0in 0.5in;line-height:107%;font-size:11pt;font-f=
amily:"Calibri",sans-serif"><span><span>2.<span style=3D"font:7pt=
"Times New Roman"">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span>Coil =E2=80=A6<span>=C2=A0 </span>In
my experience coils are very reliable but when they do fail they tend to fa=
il
as they warm up and the problem gets worse as the coil warms up<span></span=
></p>
<p style=3D"margin:0in 0in 0in 0.5in;line-height:107%;font-size:11pt;font-f=
amily:"Calibri",sans-serif"><span><span>3.<span style=3D"font:7pt=
"Times New Roman"">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span>Points =E2=80=A6 a possibility but the dwell is set at
exactly 60 degrees and does not waver at all when the engine is running in =
the
shop.<span></span></p>
<p style=3D"margin:0in 0in 8pt 0.5in;line-height:107%;font-size:11pt;font-f=
amily:"Calibri",sans-serif"><span><span>4.<span style=3D"font:7pt=
"Times New Roman"">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
</span></span></span>Fuel pump =E2=80=A6 if the engine was starving for fue=
l
because of a fuel supply issue caused by a blockage or failing pump the pro=
blem
would get worse when the demand for fuel increased, as in climbing a hill o=
f
full throttle. This was absolutely not the case.</p><p style=3D"margin:0in =
0in 8pt 0.5in;line-height:107%;font-size:11pt;font-family:"Calibri&quo=
t;,sans-serif"><br></p><p style=3D"margin:0in 0in 8pt 0.5in;line-height:107=
%;font-size:11pt;font-family:"Calibri",sans-serif">Any ideas folk=
s?<br></p><p style=3D"margin:0in 0in 8pt 0.5in;line-height:107%;font-size:1=
1pt;font-family:"Calibri",sans-serif"><br></p>
</div></div>
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