constent spark


Information and questions on GL1100 Goldwings (1980-1983)
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antiquepuller
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constent spark

Postby antiquepuller » Sat Aug 31, 2013 4:28 pm



Does anyone have any ideas why when I turn on the ignition I have spark at all 4 plugs with out turning the motor over. Its a 1982 GL1100



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WingAdmin
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Re: constent spark

Postby WingAdmin » Tue Sep 03, 2013 9:56 pm

antiquepuller wrote:Does anyone have any ideas why when I turn on the ignition I have spark at all 4 plugs with out turning the motor over. Its a 1982 GL1100


That's a bit bizarre, being that the pulses to generate the spark come from the pulse generators, which pick up magnetic impulses as the engine turns. You're saying you see sparks on the plugs when the ignition is on, but the engine is not?

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virgilmobile
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Re: constent spark

Postby virgilmobile » Wed Sep 04, 2013 8:48 am

Is it just one spark or many...?
This is weird.. :?:

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patbrandon1
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Re: constent spark

Postby patbrandon1 » Wed Sep 04, 2013 6:29 pm

Holy Toledo antiquepuller. That is very strange. Curious as to how you found that you are having spark to all four plugs.

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tom84std
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Re: constent spark

Postby tom84std » Thu Sep 05, 2013 6:17 am

I'm well known for being wrong most of the time, but I'm thinking he might have meant he sees one spark when he turns the key on. Not that there's any relation but my BSA sometimes does that, it's the Boyer. If he's seeing continuous sparking with the key on and the engine off, I'm fascinated as to how.

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Wingsconsin
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Re: constent spark

Postby Wingsconsin » Thu Sep 05, 2013 10:46 am

I think the GL1100 is a "wasted spark" system.. :?: :?


From Wikipedia-
The wasted spark system is an ignition system used with some four-stroke cycle internal combustion engines. In a wasted spark system, the spark plugs fire in pairs even though one is on its compression stroke and one is on its exhaust stroke. The extra spark on the exhaust stroke has no effect and is thus "wasted".

This design halves the number of components in a typical ignition system, while the extra spark, against much reduced dielectric resistance, barely impacts on the lifespan of modern ignition components. In a typical engine, it requires only about 2 to 3kV to fire the cylinder on the exhaust strokes. The remaining coil energy is available to fire the spark plug under compression (typically about 8 to 12 kV).

Perhaps the most significant advantage of the system, compared to a single coil and distributor systems, is that it eliminated the high-tension distributor.[1] This significantly improves reliability, since many problems with a conventional system are caused by the distributor being affected by dampness from rain or condensation, dirt accumulation, and degradation of insulating materials with time. Although plug-top coil systems would later offer this same advantage, they were not available for another 30 years. Plug-top systems increase the number of coils required, the heat that these coils must survive, and so their demands on materials science for insulators.

Wasted spark systems still require a timing signal from the crankshaft. In a conventional four-stroke engine, this signal must also observe the phase of the camshaft relative to the crankshaft, so contact breakers are normally driven from the camshaft and distributor drive. With a wasted spark, the crankshaft can be used instead, as the system fires on both revolutions. It simplifies the mechanical arrangements since there is no distributor drive and the contact breaker cam can be fixed to the crankshaft. Although a 2:1 reduction gear is still required to operate the camshaft and valves, the precision of this drive is now less critical (ignition timing is more critical for engine performance than valve timing): engines continue to run adequately even with worn camshaft drives and imprecise timing.
Postings are my opinions based on experience and acquired knowledge.
Your results may vary. Universal disclaimers apply.


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thrasherg
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Re: constent spark

Postby thrasherg » Thu Sep 05, 2013 10:51 am

Are you running the stock ignition? It sounds to me like your CDI has failed and is running all the time (ie the circuitry that should use the pulse generators to fire, has failed and it is just firing all the time). I would be looking for a second hand CDI, or see if someone would lend you one to try swapping out, can't think of anything else that would cause all the spark plugs to fire all the time without the engine running.

Gary

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JDMAG
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Re: constent spark

Postby JDMAG » Thu Sep 05, 2013 10:53 pm

Interesting read Wingsconsin.

antiquepuller
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Re: constent spark

Postby antiquepuller » Wed Sep 11, 2013 6:50 pm

Yes it had constent spark at all the plugs when the ignition was on and motor not running found this when I wanted to check spark have since then found that the ground wire at the coils was hot regrounded and the problem has disappeared for now

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thrasherg
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Re: constent spark

Postby thrasherg » Thu Sep 12, 2013 8:51 am

I can't see how a bad earth on the coils would give a constant spark? :?: but glad to hear you have fixed the issue and fixed it for a very reasonable cost :lol: bad earths do cause many strange things to happen.

Gary

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WingAdmin
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Re: constent spark

Postby WingAdmin » Fri Sep 13, 2013 3:06 pm

antiquepuller wrote:Yes it had constent spark at all the plugs when the ignition was on and motor not running found this when I wanted to check spark have since then found that the ground wire at the coils was hot regrounded and the problem has disappeared for now


There is no ground wire at the coils! There are two primary wires. One should be hot at all times (unless the ignition or kill switches are turned off), and the other goes to the spark unit, where it is grounded intermittently in order to produce spark.

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Re: constent spark

Postby littlebeaver » Thu Sep 19, 2013 9:27 am

WingAdmin wrote:
antiquepuller wrote:Yes it had constent spark at all the plugs when the ignition was on and motor not running found this when I wanted to check spark have since then found that the ground wire at the coils was hot regrounded and the problem has disappeared for now


There is no ground wire at the coils! There are two primary wires. One should be hot at all times (unless the ignition or kill switches are turned off), and the other goes to the spark unit, where it is grounded intermittently in order to produce spark.

There is a ground wire that is fastened to the bottom of the casing of the coil that runs from the RR, is that what you are referring too...? Now I have to wonder if your spark units are melted..You know that black goo that melts out of them...Expoxy or what ever..




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