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?

Post by F6Fritz »



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: 4024
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: Lost spark on 1&2 cylinder?

Post by dingdong »

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

Re: Lost spark on 1&2 cylinder?

Post by F6Fritz »

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

Thanks
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Fred Camper
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Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Lost spark on 1&2 cylinder?

Post by Fred Camper »

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.
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dingdong
Posts: 4024
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: Lost spark on 1&2 cylinder?

Post by dingdong »

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.


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