Poor running question
It would seem it is just 1 coil with 2 high voltage taps. Use an ohm meter
to check the resistance on each tap, if the same = 1 coil 2 taps. If
different possibly separate set of windings for each tap.
Steve
On Mon, Aug 24, 2020, 9:19 AM James Calandro capod2t@gmail.com wrote:
I do not see how they could be in series. My logic for saying parallel is
that in series if one we totally disconnected like mine was then both would
not work and my bike would have been running on one cylinder. It was
clearly running on both cylinders just poorly at low rpm and part
throttle. It was miserable in intown traffic but was almost normal out on
the open highway. Not saying you are wrong because I really do not know
but just sharing my logic. Christmas tree lights that are in series have
the whole string go out when one bulb burns out or is removed.
Jim
Jim Calandro
il Capo
US DESMO
www.usdesmo.com
704-843-0429
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On Mon, Aug 24, 2020 at 2:46 AM T st2_@ticino.com wrote:
No, they are in series.
Tom
On 8/22/2020 4:19 PM, James Calandro wrote:
It is one coil with two outlets so I assume they are in parallel.
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Gnd-plug-coil1-coil2-plug-gnd.
Remove one plug, the internal spark gap will fire.
Parallel will not work.
I am an EE, and three of my bikes are twin-spark (2x LMIV, SS1000DS).
Tom
On 8/24/2020 3:18 PM, James Calandro wrote:
I do not see how they could be in series. My logic for saying
parallel is that in series if one we totally disconnected like mine
was then both would not work and my bike would have been running on
one cylinder. It was clearly running on both cylinders just poorly at
low rpm and part throttle. It was miserable in intown traffic but was
almost normal out on the open highway. Not saying you are wrong
because I really do not know but just sharing my logic. Christmas
tree lights that are in series have the whole string go out when one
bulb burns out or is removed.
Jim
Jim Calandro
il Capo
US DESMO
www.usdesmo.com http://www.usdesmo.com
704-843-0429
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On Mon, Aug 24, 2020 at 2:46 AM T <st2_@ticino.com
mailto:st2_@ticino.com> wrote:
No, they are in series.
Tom
On 8/22/2020 4:19 PM, James Calandro wrote:
It is one coil with two outlets so I assume they are in parallel.
To get the links and updates on all today's Ducati news:
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and
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Coil wiring diagram.
Jack Ward
Knoxville, TN, USA
On Mon, Aug 24, 2020 at 10:58 AM T st2_@ticino.com wrote:
Gnd-plug-coil1-coil2-plug-gnd.
Remove one plug, the internal spark gap will fire.
Parallel will not work.
I am an EE, and three of my bikes are twin-spark (2x LMIV, SS1000DS).
Tom
On 8/24/2020 3:18 PM, James Calandro wrote:
I do not see how they could be in series. My logic for saying parallel is
that in series if one we totally disconnected like mine was then both would
not work and my bike would have been running on one cylinder. It was
clearly running on both cylinders just poorly at low rpm and part
throttle. It was miserable in intown traffic but was almost normal out on
the open highway. Not saying you are wrong because I really do not know
but just sharing my logic. Christmas tree lights that are in series have
the whole string go out when one bulb burns out or is removed.
Jim
Jim Calandro
il Capo
US DESMO
www.usdesmo.com
704-843-0429
https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon Virus-free.
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On Mon, Aug 24, 2020 at 2:46 AM T st2_@ticino.com wrote:
No, they are in series.
Tom
On 8/22/2020 4:19 PM, James Calandro wrote:
It is one coil with two outlets so I assume they are in parallel.
To get the links and updates on all today's Ducati news:
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and
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Mailto: st2_@ticino.com
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Thanks, Jack!
Anyway, if one plug is not there, there is (hopefully) an internal spark
gap (in parallel with the plug) to protect the coil (otherwise the coil
will destroy itself from internal arcing) and allow the other plug to fire.
Tom
On 8/25/2020 5:08 AM, Jack Ward wrote:
Coil wiring diagram.
Jack Ward
Knoxville, TN, USA
On Mon, Aug 24, 2020 at 10:58 AM T <st2_@ticino.com
mailto:st2_@ticino.com> wrote:
Gnd-plug-coil1-coil2-plug-gnd.
Remove one plug, the internal spark gap will fire.
Parallel will not work.
I am an EE, and three of my bikes are twin-spark (2x LMIV, SS1000DS).
Tom
On 8/24/2020 3:18 PM, James Calandro wrote:
I do not see how they could be in series. My logic for saying
parallel is that in series if one we totally disconnected like
mine was then both would not work and my bike would have been
running on one cylinder. It was clearly running on both cylinders
just poorly at low rpm and part throttle. It was miserable in
intown traffic but was almost normal out on the open highway.
Not saying you are wrong because I really do not know but just
sharing my logic. Christmas tree lights that are in series have
the whole string go out when one bulb burns out or is removed.
Jim
Jim Calandro
il Capo
US DESMO
www.usdesmo.com <http://www.usdesmo.com>
704-843-0429
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon>
Virus-free. www.avast.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link>
On Mon, Aug 24, 2020 at 2:46 AM T <st2_@ticino.com
<mailto:st2_@ticino.com>> wrote:
No, they are in series.
Tom
On 8/22/2020 4:19 PM, James Calandro wrote:
It is one coil with two outlets so I assume they are in
parallel.
To get the links and updates on all today's Ducati news:
http://www.ductalk.com/
and
https://www.facebook.com/ducnet
_____________________
Ducati mailing list
Ducati@list.ducati.net <mailto:Ducati@list.ducati.net>
http://list.ducati.net/mailman/listinfo/ducati_list.ducati.net
Mailto: capod2t@gmail.com <mailto:capod2t@gmail.com>
To get the links and updates on all today's Ducati news:
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and
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_____________________
Ducati mailing list
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I am guessing the fact that it kept running means there must have been an
internal spark gap. Oh well today I will fill it with gas and start it up
and see where I am. Fortunately I have some spare coils from my 05 SS that
I parted out.
Jim Calandro
il Capo
US DESMO
www.usdesmo.com
704-843-0429
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On Tue, Aug 25, 2020 at 2:14 AM T st2_@ticino.com wrote:
Thanks, Jack!
Anyway, if one plug is not there, there is (hopefully) an internal spark
gap (in parallel with the plug) to protect the coil (otherwise the coil
will destroy itself from internal arcing) and allow the other plug to fire.
Tom
On 8/25/2020 5:08 AM, Jack Ward wrote:
Coil wiring diagram.
Jack Ward
Knoxville, TN, USA
On Mon, Aug 24, 2020 at 10:58 AM T st2_@ticino.com wrote:
Gnd-plug-coil1-coil2-plug-gnd.
Remove one plug, the internal spark gap will fire.
Parallel will not work.
I am an EE, and three of my bikes are twin-spark (2x LMIV, SS1000DS).
Tom
On 8/24/2020 3:18 PM, James Calandro wrote:
I do not see how they could be in series. My logic for saying parallel
is that in series if one we totally disconnected like mine was then both
would not work and my bike would have been running on one cylinder. It was
clearly running on both cylinders just poorly at low rpm and part
throttle. It was miserable in intown traffic but was almost normal out on
the open highway. Not saying you are wrong because I really do not know
but just sharing my logic. Christmas tree lights that are in series have
the whole string go out when one bulb burns out or is removed.
Jim
Jim Calandro
il Capo
US DESMO
www.usdesmo.com
704-843-0429
https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon Virus-free.
www.avast.com
https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link
On Mon, Aug 24, 2020 at 2:46 AM T st2_@ticino.com wrote:
No, they are in series.
Tom
On 8/22/2020 4:19 PM, James Calandro wrote:
It is one coil with two outlets so I assume they are in parallel.
To get the links and updates on all today's Ducati news:
http://www.ductalk.com/
and
https://www.facebook.com/ducnet
Ducati mailing list
Ducati@list.ducati.net
http://list.ducati.net/mailman/listinfo/ducati_list.ducati.net
Mailto: capod2t@gmail.com
To get the links and updates on all today's Ducati news:http://www.ductalk.com/
andhttps://www.facebook.com/ducnet
Ducati mailing listDucati@list.ducati.nethttp://list.ducati.net/mailman/listinfo/ducati_list.ducati.net
Mailto: st2_@ticino.com
To get the links and updates on all today's Ducati news:
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Mailto: st2_@ticino.com
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I suspect that maybe the loose plug wire was arcing to the frame or the
head, allowing it to fire the remaining plug. Just a theory, or it could be
like you suggest and have an internal spark gap for reliability.
Jack Ward
Now in Knoxville, TN, USA
On Tue, Aug 25, 2020, 2:15 AM T st2_@ticino.com wrote:
Thanks, Jack!
Anyway, if one plug is not there, there is (hopefully) an internal spark
gap (in parallel with the plug) to protect the coil (otherwise the coil
will destroy itself from internal arcing) and allow the other plug to fire.
Tom
On 8/25/2020 5:08 AM, Jack Ward wrote:
Coil wiring diagram.
Jack Ward
Knoxville, TN, USA
On Mon, Aug 24, 2020 at 10:58 AM T st2_@ticino.com wrote:
Gnd-plug-coil1-coil2-plug-gnd.
Remove one plug, the internal spark gap will fire.
Parallel will not work.
I am an EE, and three of my bikes are twin-spark (2x LMIV, SS1000DS).
Tom
On 8/24/2020 3:18 PM, James Calandro wrote:
I do not see how they could be in series. My logic for saying parallel
is that in series if one we totally disconnected like mine was then both
would not work and my bike would have been running on one cylinder. It was
clearly running on both cylinders just poorly at low rpm and part
throttle. It was miserable in intown traffic but was almost normal out on
the open highway. Not saying you are wrong because I really do not know
but just sharing my logic. Christmas tree lights that are in series have
the whole string go out when one bulb burns out or is removed.
Jim
Jim Calandro
il Capo
US DESMO
www.usdesmo.com
704-843-0429
https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon Virus-free.
www.avast.com
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On Mon, Aug 24, 2020 at 2:46 AM T st2_@ticino.com wrote:
No, they are in series.
Tom
On 8/22/2020 4:19 PM, James Calandro wrote:
It is one coil with two outlets so I assume they are in parallel.
To get the links and updates on all today's Ducati news:
http://www.ductalk.com/
and
https://www.facebook.com/ducnet
Ducati mailing list
Ducati@list.ducati.net
http://list.ducati.net/mailman/listinfo/ducati_list.ducati.net
Mailto: capod2t@gmail.com
To get the links and updates on all today's Ducati news:http://www.ductalk.com/
andhttps://www.facebook.com/ducnet
Ducati mailing listDucati@list.ducati.nethttp://list.ducati.net/mailman/listinfo/ducati_list.ducati.net
Mailto: st2_@ticino.com
To get the links and updates on all today's Ducati news:
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Mailto: jaxn51@gmail.com
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