Lost spark on 1&2 cylinder?


Information and questions on GL1000 Goldwings (1975-1979)
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F6Fritz
Posts: 6
Joined: Sat Sep 15, 2012 8:31 pm
Location: Manitowoc, Wisconsin
Motorcycle: 1078 gl1000

Lost spark on 1&2 cylinder?

Postby F6Fritz » Wed Aug 26, 2015 7:24 pm



I street tracked a 78 and completely when through the bike. Started it a couple weeks ago a it ran great. Put about 150 mile on it on mutible short rides. Then one night I took a short ride 7or 8 mile and it started running bad but made it home. The next day I started it up and it ran great but after about 5 or 6 mile it ran bad again. Limped it home and discovered 1and 2 where not firing. The bike has electronic ignition and dyna coils. Can't figure out why that 1 and 2 coils is not firing. I hooked up the old coils I had but had the same result. Compared the power at the 6 pin connector from the harness(disconnected)to the coils to a friends bike and its same. The last thing noticed is that with the key in the on position and the 6 pin connector connected I have power at the yellow wire which goes to the coil for 1 and 2 and no power at the blue wire for 3 and 4. I'm very confused.

Thanks in advance for some help.
Fritz



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dingdong
Posts: 2864
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Lost spark on 1&2 cylinder?

Postby dingdong » Thu Aug 27, 2015 7:22 am

Dyna S ignitions (If that is what you have) are known for heat related failures on one or the other module. When it gets hot it will start missing.

Tom
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

F6Fritz
Posts: 6
Joined: Sat Sep 15, 2012 8:31 pm
Location: Manitowoc, Wisconsin
Motorcycle: 1078 gl1000

Re: Lost spark on 1&2 cylinder?

Postby F6Fritz » Thu Aug 27, 2015 11:53 am

Yah, that's what I've been thinking too.

Thanks

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Fred Camper
Posts: 1155
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Lost spark on 1&2 cylinder?

Postby Fred Camper » Sat Aug 29, 2015 7:23 pm

An old Dyna III did that to me, but it went on the bike in 1984 so it did not owe me anything. Important that Dyna gets a full voltage, mine ran a lot better once the new Dyna was on when I installed a relay to allow full battery power to the Dyna with no drop through the ignition circuit. I was having a miss when the blinker was on, and firing when it was off. That little drop in voltage was enough to upset the Dyna. So they need clean power.

User avatar
dingdong
Posts: 2864
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Lost spark on 1&2 cylinder?

Postby dingdong » Sun Aug 30, 2015 7:20 am

Fred Camper wrote:An old Dyna III did that to me, but it went on the bike in 1984 so it did not owe me anything. Important that Dyna gets a full voltage, mine ran a lot better once the new Dyna was on when I installed a relay to allow full battery power to the Dyna with no drop through the ignition circuit. I was having a miss when the blinker was on, and firing when it was off. That little drop in voltage was enough to upset the Dyna. So they need clean power.


Right! I forgot about that. I also had to install relay on mine.


Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.


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