1994 GL1500SE intermittent loss of power


Information and questions on GL1500 Goldwings (1988-2000)
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hondagw63
Posts: 2
Joined: Wed Nov 24, 2010 12:13 am
Location: Atmore, AL
Motorcycle: 1994 GL1500SE

1994 GL1500SE intermittent loss of power

Postby hondagw63 » Tue Apr 28, 2015 2:21 pm



I have a real head-scratcher for you experts. I have a 1994 GL1500SE and have been battling (unsuccessfully) an intermittent loss of power problem. The problem is that the bike starts out running great hitting on all 6 cylinders and with full power. After riding a bit, it feels as if the engine drops to 4 or 3 cylinders. Sometimes it will clear up after just a little bit but other times I limp back home. This can happen within 1 mile of leaving home or like Sunday, after riding 30 miles. The carburetors have been rebuilt 2 times - once by me and once my an experienced independent Gold Wing mechanic. After the 2nd rebuild, it was ok for a while. I took it back to the mechanic who worked with it for a couple months and finally gave up. He went back through the carburetors, tested with a known good fuel pump (from his wife's bike), and consulted with Honda dealers that he has connections with. I can't determine if this is a fuel or an electrical problem though when riding it feels more like a fuel starvation problem. I have been a reader of this forum for several years but have not seen a post with a problem just like mine. Looking for anyone that can help. Thanks.



keiths
Posts: 3
Joined: Sun Dec 22, 2013 12:16 am
Location: Colorado Springs, Colorado
Motorcycle: 1992 GL1500a

Re: 1994 GL1500SE intermittent loss of power

Postby keiths » Tue Apr 28, 2015 4:48 pm

I would check the fuel filter. If you blow through it and encounter any resistance I would replace it. Fuel lines can also collapse on the inside causing a restriction. Possible petcock issue?

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virgilmobile
Posts: 7655
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: 1994 GL1500SE intermittent loss of power

Postby virgilmobile » Tue Apr 28, 2015 6:42 pm

You wouldn't by chance have a volt meter you can see while riding.Attach it to a black/white switched power wire.Mine is attached directly to the ignition module power lead.
If the volts drop off from some connection problem, the ignition will start to fail...Feels like its misfiring or running out of gas.
Been there done that...bad connection from the charging system.Voltage fluctuating from 14.1 down to 9.6 then back up later.
Also have you tried to run it with the gas cap loosened when it acts up.?

hondagw63
Posts: 2
Joined: Wed Nov 24, 2010 12:13 am
Location: Atmore, AL
Motorcycle: 1994 GL1500SE

Re: 1994 GL1500SE intermittent loss of power

Postby hondagw63 » Wed Apr 29, 2015 1:33 pm

I have tried riding with the gas cap loose but that did not help at all. Also, using the choke does not have any effect on it.
I connected my digital multi-meter last evening so I could watch it on my way to work today. Bike lost power after about 2 miles, then ran ok after about another mile, then lost it again after another half mile. Voltage dropped from 13.5 to 13.1 - I was expecting a more significant drop. The voltage only recovered to 13.2 during the short ok period. Did you find any particular connection to be bad or more suspect than others?

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virgilmobile
Posts: 7655
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: 1994 GL1500SE intermittent loss of power

Postby virgilmobile » Wed Apr 29, 2015 2:11 pm

Where were you measuring the volts.
A drop to 13.1...was that drop matching the rpm drop or just sudden drop.?
If this were by me,I'd step by step check stuff.
Is there sufficient volts feeding the coils/ignition module first.This is the most likely cause of "going fine then stumbles for a mile then runs fine again".
It does sounds like a bad ground or power loss.
It would take a bit of work to get to it,but the best place to measure the volts I'd directly at the ignition module.i do mean the power and the ground wires,not the battery and frame.
If the volts stay steady(above 13 volts) you may have one coil failing.
Inspecting the spark plugs may help determine where the problem is.
Don't forget about the green grounding block.get to it and unplug the shorting bar and inspect the connections.It should be near the ignition module.




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