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I'm with everyone else. bypass the battery cut off switch and see if that
fixes the problem.
Ira Erbs
Portland,OR
_______ _______
(______ \____1959 BN4____/ _______)
(_________________________)
BT7 engine and disk brakes
1967 MGB [image: MG]
A racing car is an animal with a thousand adjustments. Mario Andretti
Please excuse random auto corrects and misspelled words
On Tue, Mar 19, 2019 at 1:48 PM Michael Oritt <michael.oritt@gmail.com>
wrote:
> Yesterday morning I went out for a drive and after about five miles the
> car suddenly died. There was no rough running, sputtering or missing
> leading up to it=E2=80=94the car simply died. I coasted to the side of th=
e road and
> after about 30 seconds since the key was still on I pushed the start
> button. To my surprise the car started immediately, revved freely and idl=
ed
> smoothly. A bit perplexed I decided to drive on to see what would happen
> now that I was paying close attention. The car accelerated smoothly and r=
an
> fine for about 1/2 mile and then it died again in the same manner as
> earlier. I shut off the key, popped the hood and examined the ignition
> system. Everything seemed fine=E2=80=94all spark plug leads were firmly i=
n place as
> was the lead from the coil to the distributor. The power wires to the coi=
l
> were tight and the harness/connector to the distributor (see below) seeme=
d
> fine.
>
>
> After scratching my head for a couple of minutes I got in the car, turned
> on the ignition and pushed the start button. Again, the car started right
> up and ran normally. With fingers crossed I headed for my shop/garage,
> about ten miles away and got there without any further event. Though the
> problem did not seem to be fuel related I decided to verify that this was
> not a fuel delivery issue. I have a double-headed SU fuel pump wired to a
> switch mounted just behind the driver=E2=80=99s seat which allows me to s=
witch
> between pumps as well as turn the fuel pump off. While I was running the
> car at highway speeds it ran perfectly on either pump and when I selected
> the =E2=80=9Coff=E2=80=9D position it slowly lost power as I expected it =
to=E2=80=94but in no way
> like it had suddenly twice died 15 or so minutes earlier. This indicated =
I
> was not dealing with a fuel issue but rather something related either to
> the ignition system or to the primary wires that run to it.
>
>
> This morning I dove a bit deeper to try and diagnose the problem. The car
> has a Mallory Unilite ignition system tied to an MSD coil which has been =
in
> place and performed faultlessly for a number of years. I removed the
> distributor cap and everything appears to be okay, at least visually. The
> interior of the distributor was clean and dry as was the cap, leads, carb=
on
> contact, optical reader, etc. Mallory specifies the use of a ballast
> resistor in the lead from the power source to the coil and with the engin=
e
> fast-idling I tested 12.5 VDC to the resistor and about 5.5-6 VDC out of =
it
> and at the positive coil terminal.
>
>
> I have a large low-oil pressure light that is mounted in the dash in plac=
e
> of the original overdrive switch. It is wired from the ignition switch
> through a 10 psi normally-closed switch mounted in the oil pressure gauge
> sender line and then to the light. I point this out because both times wh=
en
> the engine shut down yesterday the light immediately came on, from which =
I
> conclude that the ignition switch itself is not the source of the problem=
.
> And though I did not remove the ignition key switch the wires to and from
> it seem tight and intact.
>
>
> So my question is: What do I do? I hate to throw parts at it without
> finding something that appears to be defective but I don=E2=80=99t know w=
here to
> start any further tests, etc. I also don=E2=80=99t want to simply wait fo=
r the
> issue to happen again. BTW over the weekend I drove about 150 miles with =
no
> issues whatever. Beyond installing four new plugs last week I have not
> performed any work related to the ignition system. All
> suggestions/questions welcome=E2=80=A6.
>
> Best--Michael Oritt, BN1
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
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>
> Archive: http://www.team.net/pipermail/healeys
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>
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>
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>
>
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<div dir=3D"ltr">I'm with everyone else. bypass the battery cut off swi=
tch and see if that fixes the problem.<br clear=3D"all"><div><div dir=3D"lt=
r" class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D=
"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><di=
v><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><div dir=3D"=
ltr">Ira Erbs<div>Portland,OR</div><div><span style=3D"font-family:'Tim=
es New Roman',serif">=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_______</span><br style=3D"font-family:'Times N=
ew Roman',serif"><span style=3D"font-family:'Times New Roman',s=
erif">=C2=A0 =C2=A0=C2=A0 (______ \____1959 BN4____/ _______)</span><br sty=
le=3D"font-family:'Times New Roman',serif"><span style=3D"font-fami=
ly:'Times New Roman',serif">=C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0 (____=
_____________________)</span></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
BT7 engine and disk brakes</div><div><br></div><div><br></div><div>1967 MGB=
=C2=A0<img src=3D"http://www.britishcarspecialists.com/assets/images/MG_em=
blem.jpg" alt=3D"MG"></div><div><br></div><div><span style=3D"color:rgb(51,=
51,51);font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;fo=
nt-size:14px">A racing car is an animal with a thousand adjustments. Mario =
Andretti</span><br></div><div>Please excuse random auto corrects and misspe=
lled words</div></div></div></div></div></div></div></div></div></div></div=
></div></div></div></div></div></div><br></div><br><div class=3D"gmail_quot=
e"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Mar 19, 2019 at 1:48 PM Mi=
chael Oritt <<a href=3D"mailto:michael.oritt@gmail.com";>michael.oritt@gm=
ail.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"color:rgb(51,=
51,255)"><span style=3D"color:rgb(51,51,51);font-family:Verdana,Arial,Tahom=
a,Calibri,Geneva,sans-serif;font-size:13px;background-color:rgb(250,250,250=
)">Yesterday morning I went out for a drive and after about five miles the =
car suddenly died. There was no rough running, sputtering or missing leadin=
g up to it=E2=80=94the car simply died. I coasted to the side of the road a=
nd after about 30 seconds since the key was still on I pushed the start but=
ton. To my surprise the car started immediately, revved freely and idled sm=
oothly. A bit perplexed I decided to drive on to see what would happen now =
that I was paying close attention. The car accelerated smoothly and ran fin=
e for about 1/2 mile and then it died again in the same manner as earlier. =
I shut off the key, popped the hood and examined the ignition system. Every=
thing seemed fine=E2=80=94all spark plug leads were firmly in place as was =
the lead from the coil to the distributor. The power wires to the coil were=
tight and the harness/connector to the distributor (see below) seemed fine=
.</span><br style=3D"color:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,C=
alibri,Geneva,sans-serif;font-size:13px;background-color:rgb(250,250,250)">=
<br style=3D"color:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,G=
eneva,sans-serif;font-size:13px;background-color:rgb(250,250,250)"><br styl=
e=3D"color:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sa=
ns-serif;font-size:13px;background-color:rgb(250,250,250)"><span style=3D"c=
olor:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-ser=
if;font-size:13px;background-color:rgb(250,250,250)">After scratching my he=
ad for a couple of minutes I got in the car, turned on the ignition and pus=
hed the start button. Again, the car started right up and ran normally. Wit=
h fingers crossed I headed for my shop/garage, about ten miles away and got=
there without any further event. Though the problem did not seem to be fue=
l related I decided to verify that this was not a fuel delivery issue. I ha=
ve a double-headed SU fuel pump wired to a switch mounted just behind the d=
river=E2=80=99s seat which allows me to switch between pumps as well as tur=
n the fuel pump off. While I was running the car at highway speeds it ran p=
erfectly on either pump and when I selected the =E2=80=9Coff=E2=80=9D posit=
ion it slowly lost power as I expected it to=E2=80=94but in no way like it =
had suddenly twice died 15 or so minutes earlier. This indicated I was not =
dealing with a fuel issue but rather something related either to the igniti=
on system or to the primary wires that run to it.=C2=A0</span><br style=3D"=
color:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-se=
rif;font-size:13px;background-color:rgb(250,250,250)"><br style=3D"color:rg=
b(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;font=
-size:13px;background-color:rgb(250,250,250)"><br style=3D"color:rgb(51,51,=
51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;font-size:13=
px;background-color:rgb(250,250,250)"><span style=3D"color:rgb(51,51,51);fo=
nt-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;font-size:13px;bac=
kground-color:rgb(250,250,250)">This morning I dove a bit deeper to try and=
diagnose the problem. The car has a Mallory Unilite ignition system tied t=
o an MSD coil which has been in place and performed faultlessly for a numbe=
r of years. I removed the distributor cap and everything appears to be okay=
, at least visually. The interior of the distributor was clean and dry as w=
as the cap, leads, carbon contact, optical reader, etc. Mallory specifies t=
he use of a ballast resistor in the lead from the power source to the coil =
and with the engine fast-idling I tested 12.5 VDC to the resistor and about=
5.5-6 VDC out of it and at the positive coil terminal.=C2=A0</span><br sty=
le=3D"color:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,s=
ans-serif;font-size:13px;background-color:rgb(250,250,250)"><br style=3D"co=
lor:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-seri=
f;font-size:13px;background-color:rgb(250,250,250)"><br style=3D"color:rgb(=
51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;font-s=
ize:13px;background-color:rgb(250,250,250)"><span style=3D"color:rgb(51,51,=
51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;font-size:13=
px;background-color:rgb(250,250,250)">I have a large low-oil pressure light=
that is mounted in the dash in place of the original overdrive switch. It =
is wired from the ignition switch through a 10 psi normally-closed switch m=
ounted in the oil pressure gauge sender line and then to the light. I point=
this out because both times when the engine shut down yesterday the light =
immediately came on, from which I conclude that the ignition switch itself =
is not the source of the problem. And though I did not remove the ignition =
key switch the wires to and from it seem tight and intact.</span><br style=
=3D"color:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,san=
s-serif;font-size:13px;background-color:rgb(250,250,250)"><br style=3D"colo=
r:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;=
font-size:13px;background-color:rgb(250,250,250)"><br style=3D"color:rgb(51=
,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;font-siz=
e:13px;background-color:rgb(250,250,250)"><span style=3D"color:rgb(51,51,51=
);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;font-size:13px=
;background-color:rgb(250,250,250)">So my question is: What do I do? I hate=
to throw parts at it without finding something that appears to be defectiv=
e but I don=E2=80=99t know where to start any further tests, etc. I also do=
n=E2=80=99t want to simply wait for the issue to happen again. BTW over the=
weekend I drove about 150 miles with no issues whatever. Beyond installing=
four new plugs last week I have not performed any work related to the igni=
tion system. All suggestions/questions welcome=E2=80=A6.</span><br></div><d=
iv class=3D"gmail_default" style=3D"color:rgb(51,51,255)"><span style=3D"co=
lor:rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-seri=
f;font-size:13px;background-color:rgb(250,250,250)"><br></span></div><div c=
lass=3D"gmail_default" style=3D"color:rgb(51,51,255)"><span style=3D"color:=
rgb(51,51,51);font-family:Verdana,Arial,Tahoma,Calibri,Geneva,sans-serif;fo=
nt-size:13px;background-color:rgb(250,250,250)">Best--Michael Oritt, BN1</s=
pan></div></div>
_______________________________________________<br>
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</blockquote></div>
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