Author Topic: gs500e no spark on left cylinder  (Read 4662 times)

Offline rich3389

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gs500e no spark on left cylinder
« on: January 27, 2015, 01:05:49 AM »
I am trying to track down a problem with a bike I recently purchased. I bought the bike with the left cylinder not firing. I tracked  it down to the left coil not providing spark. Things I have done so far is...

Swapped the coils around and it still did not fire on the left side.
The orange wire does provide the coil with 12 volts. Checked all other connections around the coil area and the CDI area.
I tested the signal generator and the resistance was in spec as well as both primary and secondary for the coils.

I am at a loss now any other ideas?  :dunno_black:
« Last Edit: January 27, 2015, 01:09:23 AM by rich3389 »

Offline floatingLomas

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Re: gs500e no spark on left cylinder
« Reply #1 on: January 27, 2015, 01:51:36 AM »
So you're sure there's no spark from that side?

I ask because my left cylinder wouldn't fire, and it turned out to be a leaking vaccuum diaphragm which was drowning out the cylinder.  Capping the vaccuum ports and running on prime solved it.

If it ain't that, I got nothin. :P
« Last Edit: January 27, 2015, 01:53:37 AM by floatingLomas »
I know a little bit about a lot of things - usually just enough to be dangerous.

My 93 GS500E

Offline rich3389

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Re: gs500e no spark on left cylinder
« Reply #2 on: January 27, 2015, 02:12:49 AM »
So you're sure there's no spark from that side?

I ask because my left cylinder wouldn't fire, and it turned out to be a leaking vaccuum diaphragm which was drowning out the cylinder.  Capping the vaccuum ports and running on prime solved it.

If it ain't that, I got nothin. :P

I am sure, I took the spark plug out and grounded it to the engine while running and it wasn't sparking.

Offline floatingLomas

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Re: gs500e no spark on left cylinder
« Reply #3 on: January 27, 2015, 05:47:20 AM »
Alright, then I got nothin. :(
I know a little bit about a lot of things - usually just enough to be dangerous.

My 93 GS500E

Offline gsJack

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Re: gs500e no spark on left cylinder
« Reply #4 on: January 27, 2015, 12:09:52 PM »
Long shot, you switched coils and problem remained on left side.  Did you change plugs or switch them side to side?
407,400 miles in 30 years for 13,580 miles/year average.  Started riding 7/21/84 and hung up helmet 8/31/14.

Offline sledge

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Re: gs500e no spark on left cylinder
« Reply #5 on: January 27, 2015, 07:11:24 PM »
Look on the negative battery terminal...is the small black wire connected?

Its the return for the ignition control module. If its not connected or making a poor connection all sorts of weird shaZam! happens  :thumb:

Offline rich3389

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Re: gs500e no spark on left cylinder
« Reply #6 on: January 27, 2015, 10:54:18 PM »
Look on the negative battery terminal...is the small black wire connected?

Its the return for the ignition control module. If its not connected or making a poor connection all sorts of weird shaZam! happens  :thumb:

This was it. Only 2 strands of wire were hanging on for dear life. Thanks!

Offline bmf

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Re: gs500e no spark on left cylinder
« Reply #7 on: January 28, 2015, 03:29:06 AM »
Nice one sledge!
You think Pyrrhic victory is bad you should try Pyrrhic defeat!

Offline gsJack

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Re: gs500e no spark on left cylinder
« Reply #8 on: January 28, 2015, 03:46:14 AM »
Good call, didn't know what that small ground wire was for. 

From moto e direct.
407,400 miles in 30 years for 13,580 miles/year average.  Started riding 7/21/84 and hung up helmet 8/31/14.

Offline sledge

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Re: gs500e no spark on left cylinder
« Reply #9 on: January 28, 2015, 09:47:04 AM »
Now then Dennis.......see what a bunch of rude, offensive, clueless and unhelpful people we are....especially me!

 :D :D :D
« Last Edit: January 28, 2015, 12:00:09 PM by sledge »

Offline dennisgb

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Re: gs500e no spark on left cylinder
« Reply #10 on: January 28, 2015, 03:27:33 PM »
And so capable of patting yourself on the back and showing your arrogance at the same time.

Yes you are the God Sledge! I should bow down and kiss your feet.

I would if you weren't such a total TWIT!

Such a small little life you lead that you have to be master of the GSTwins Forum.  :o

 :thumb: :thumb: :thumb: :thumb: :thumb: :thumb: :thumb: :thumb: :thumb: :thumb:

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