Please help me diagnose before I pull my hair out!!


Information and questions on GL1500 Goldwings (1988-2000)
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bohdan
Posts: 189
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Location: Venice, Florida
Motorcycle: 1977 GL1000
1977 GL1000
1977 GL1000
1993 GL1500
2013 GL1800
2013 GL 1800 trike
2009 Yamaha

Please help me diagnose before I pull my hair out!!

Postby bohdan » Mon Sep 26, 2016 3:31 pm



Gents,

I posted this same topic three years or so ago. Thought I had it licked, but it has come back to haunt me once again. THis is especially hard since it is difficult to diagnose intermittent problems. I don't have a clue where to start. If somebody had similar issues, maybe that could be the cats meow.

1. Sometimes it doesn't start. Cranks good, charged battery.
2. Bypassed the Bank angle sensor.
3. Fuel works good. Pumps like a geyser.
4. New Fuel auto shut off valve.
5. I hear a back fire in the exhaust along attempts to start. THis means a spark is occurring when the exhaust valve opened with unburned fuel? Timing? Why intermittent?
6. Since the bike can run with the fuel in the bowls for a small second, don't think this issue is a fuel problem.
7. Kill switch was cleaned. I can see the cruise lights off and on during ignition start up
8. What does a pulse generator do? Anything to do with this? I have replaced the timing belts 20k ago.
9. Ignition relay? Would this be something it would be?
10. With my luck, once I get home it will start right up. Once I was able to push onto the lift, it did....

ANy help would be mighty obliged. Cheers



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Bluewaterhooker0
Posts: 555
Joined: Wed Nov 14, 2012 11:27 pm
Location: Tampa, Fl
Motorcycle: 1997 Goldwing GL 1500 SE

Re: Please help me diagnose before I pull my hair out!!

Postby Bluewaterhooker0 » Mon Sep 26, 2016 10:36 pm

Bohdan,
Your comment:
"6. Since the bike can run with the fuel in the bowls for a small second, don't think this issue is a fuel problem."

When the carburetor bowls are filled with gas, it starts and runs until the gas is gone ?
That WOULD point to a fuel issue, or lack of it.
Am I reading it correctly ?

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rick457
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Location: Pensacola, Florida
Motorcycle: 1989 GL1500k Goldwing
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Re: Please help me diagnose before I pull my hair out!!

Postby rick457 » Mon Sep 26, 2016 11:20 pm

Is the fuel pump filling the bowls or are you doing this manually.

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RBGERSON
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Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Please help me diagnose before I pull my hair out!!

Postby RBGERSON » Tue Sep 27, 2016 7:20 am

A leak in the vacuum line leading to the fuel valve could cause this..pump pumps but fuel valve stays shut so no fuel getting tot he carbs..or at least not enough..several threads on how to check and fix.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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bohdan
Posts: 189
Joined: Thu Apr 12, 2012 7:39 am
Location: Venice, Florida
Motorcycle: 1977 GL1000
1977 GL1000
1977 GL1000
1993 GL1500
2013 GL1800
2013 GL 1800 trike
2009 Yamaha

Re: Please help me diagnose before I pull my hair out!!

Postby bohdan » Tue Sep 27, 2016 7:48 am

Greetings Gents,

I hate intermittent issues. I go to the garage this morning and it fires right up. I wish it would stop working so that I can find the problem. I don't know if I should switch out ignition items just to say that I did it and hope for the best. Since this morning, it started up three times.

With regard to the fuel issue, I guess what I was trying to say is that the last time this happened, I pushed it up on the lift and disconnected the fuel line and tried to start it and test the fuel flow. Once again at that time, it started while fuel was running into my cup while the bike was actually running. Thinking that at this time, the existing fuel in the bowls is adequate to at least start the bike and run with the fuel in the bowls? Eliminating the fuel issue?

Mighty obliged....

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virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Please help me diagnose before I pull my hair out!!

Postby virgilmobile » Tue Sep 27, 2016 8:32 am

Locate the 12 volt power wire that feeds the ignition module.Attach a temporary volt meter to it and place it so you can watch it.When the bike won't start,verify it has at least 10.8 volts indicating the ignition system is getting plenty of power.

Isolate your problem from ignition and fuel first.
Should the volts feeding the ignition module drop below. 9.5 volts or so the spark gets very erratic.
Should the volts be intermittent, replace the main relay first and inspect its connections.

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OldZX11Rider
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Location: Garfield, Arkansas
Motorcycle: 1994 Honda GL1500 Goldwing SE

Re: Please help me diagnose before I pull my hair out!!

Postby OldZX11Rider » Tue Sep 27, 2016 8:49 am

I may be way off here, but I think I may be somewhat in line with virgilmobile.
I recall being told once that if the voltage drops below 10 volts, a 1500 Goldwing will not start.
So with that in mind, if the headlight relay failed, or only worked occasionally,
would the headlight draw enough power to keep the engine from starting?
Like I said, I may be way off but could it be possible?
For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain:

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MikeB
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Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Please help me diagnose before I pull my hair out!!

Postby MikeB » Tue Sep 27, 2016 11:59 am

virgilmobile wrote:...
Should the volts be intermittent, replace the main relay first and inspect its connections.

Which relay is the main relay?
MikeB
Tacoma, WA, USA

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virgilmobile
Posts: 7647
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Please help me diagnose before I pull my hair out!!

Postby virgilmobile » Tue Sep 27, 2016 12:30 pm

Sorry.I have just my phone as a computer.I font know what year your bike is or the relay information.
But there is a hard to get to relay that provides power to the entire ignition system.
Going from memory its called (ign) #6 relay.

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MikeB
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Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Please help me diagnose before I pull my hair out!!

Postby MikeB » Tue Sep 27, 2016 12:55 pm

I was assuming that it was #6 IGN/CRUISE Relay but was uncertain.
Thanks.
MikeB
Tacoma, WA, USA

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bohdan
Posts: 189
Joined: Thu Apr 12, 2012 7:39 am
Location: Venice, Florida
Motorcycle: 1977 GL1000
1977 GL1000
1977 GL1000
1993 GL1500
2013 GL1800
2013 GL 1800 trike
2009 Yamaha

Re: Please help me diagnose before I pull my hair out!!

Postby bohdan » Fri Oct 07, 2016 7:44 am

Greetings again, Gotta love the diagnosis. Anyhow, bike was running sweet for a couple of weeks. Then once again, overnight, didn't start. Son of a gun....... So I figured I just get a new relay #6 instead of checking on the ECu since it is more labor intensive to get shelter off yada, yada, yada. Cause I know as soon as I would get to it, the bike would run again.

So while I had my brother in law help me put the bike on the stand, it started again before the relay was put in. I switched the relay and no change. It starts.

Since this puppy is intermittent, I slowly changing the affected parts. Wish the dang thing would stay broke. Are the ECU's still avaiaible?

Maybe one more thing, while I am trying to learn the schematic wiring diagrams, on a 93 Aspy, I found all the components except the start switch. I msut be dumb cause I couldn't see it.

Mighty obliged.

You guys rock!

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Bluewaterhooker0
Posts: 555
Joined: Wed Nov 14, 2012 11:27 pm
Location: Tampa, Fl
Motorcycle: 1997 Goldwing GL 1500 SE

Re: Please help me diagnose before I pull my hair out!!

Postby Bluewaterhooker0 » Fri Oct 07, 2016 8:25 am

From the 94 Service Manual
Starter switch is located in the upper left of the first diagram.
Attachments

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bohdan
Posts: 189
Joined: Thu Apr 12, 2012 7:39 am
Location: Venice, Florida
Motorcycle: 1977 GL1000
1977 GL1000
1977 GL1000
1993 GL1500
2013 GL1800
2013 GL 1800 trike
2009 Yamaha

Re: Please help me diagnose before I pull my hair out!!

Postby bohdan » Fri Oct 07, 2016 4:44 pm

Thanks bluewater. Why did I think the reverse swtich was something to do with the lever. Cheers

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themainviking
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Location: North Bay, Ontario, Canada
Motorcycle: 2009 GL1800 AD

Re: Please help me diagnose before I pull my hair out!!

Postby themainviking » Sat Oct 08, 2016 8:37 am

would the bank angle sensor cause an intermittent problem like this?
It ain't about the destination - it's all about the journey

ImageImage

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MikeB
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Joined: Fri Dec 04, 2009 12:54 pm
Location: Tacoma, WA
Motorcycle: 1998 - GL1500 Aspencade.
2003 - GL1800A

Re: Please help me diagnose before I pull my hair out!!

Postby MikeB » Sat Oct 08, 2016 9:09 am

themainviking wrote:would the bank angle sensor cause an intermittent problem like this?


The original posters first post, item #2 item says he bypassed the bank angle sensor.
MikeB
Tacoma, WA, USA

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themainviking
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Re: Please help me diagnose before I pull my hair out!!

Postby themainviking » Mon Oct 10, 2016 10:17 am

MikeB wrote:
The original posters first post, item #2 item says he bypassed the bank angle sensor.


Yup, you are correct. He did say this and I missed it.
It ain't about the destination - it's all about the journey

ImageImage

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bohdan
Posts: 189
Joined: Thu Apr 12, 2012 7:39 am
Location: Venice, Florida
Motorcycle: 1977 GL1000
1977 GL1000
1977 GL1000
1993 GL1500
2013 GL1800
2013 GL 1800 trike
2009 Yamaha

Re: Please help me diagnose before I pull my hair out!!

Postby bohdan » Tue Oct 11, 2016 7:40 am

So far it has been starting........... It has never stalled on me. So the issue I am gonna have again (probably) is at starting also. Mighty obliged.




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