fuel system shuts bike down


Information and questions on GL1200 Goldwings (1984-1987)
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bob t
Posts: 2
Joined: Tue Sep 27, 2016 5:33 pm
Location: Larsen, Wi
Motorcycle: 1985 1200 GL LTD CFI

fuel system shuts bike down

Postby bob t » Tue Sep 27, 2016 6:01 pm



bought a 1985 GL LTD CFI with fuel system trouble. not sure what to look into to fix, it shut down at low rpm and the fuel system lite comes on, and will not restart until you wait about 45 min. to an hour. any feed back would be great.



Rusty Bike
Posts: 270
Joined: Sun Feb 28, 2016 1:55 pm
Location: New castle, PA
Motorcycle: 86 GL1200 SEi, 78 Yamaha XS750SE, 86 Honda XL125, 4.5 HP belt drive Minibike my dad built, foot clutch!

Re: fuel system shuts bike down

Postby Rusty Bike » Tue Sep 27, 2016 6:24 pm

I have the SEi but not much knowledge. I wonder if the gas tank is creating a vacuum, as in not venting properly. Try it with the gas cap loose. It's a complex system. Get the manuals and dig in. Good luck

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Rednaxs60
Posts: 728
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD, 2008 GL1800

Re: fuel system shuts bike down

Postby Rednaxs60 » Tue Sep 27, 2016 6:42 pm

Interesting issue. Check the venting as Rusty Bike mentions. If the bike shuts down at low RPM and the fuel light comes on, could also be electrical, especially since you mention the bike won't start again until some 30 to 45 minutes have passed. The only item(s) on the bike that would need time to cool down are the coils.

Next time you have the bike started, hit the kill switch and see if the fuel light comes on when it shuts down. If it does, then the system is probably working correctly. Will check mine as well for this and get back to you.

cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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Rednaxs60
Posts: 728
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD, 2008 GL1800

Re: fuel system shuts bike down

Postby Rednaxs60 » Tue Sep 27, 2016 6:48 pm

Checked my bike and when the key is turned on, the bike cycles through the checks and before starting the neutral light and oil light are the only indicators on. When the kill switch is used, the bike shuts down and the gear indicator light and oil light are the only indicator lights on. So much for that theory.

Do you have the manuals. I have them electronically and can send via wetransfer. Send PM with email address if you would like them.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

sportsfreaked
Posts: 219
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Location: Independence, MO
Motorcycle: 1981 Honda Goldwing Interstate GL1100I
1985 Honda Goldwing Limited Edition gl1200

Re: fuel system shuts bike down

Postby sportsfreaked » Wed Sep 28, 2016 12:57 pm

Are there any lights on the ECU? I also have both manuals if you need them. For the LTD there is a supplemental manual that covers the ECU and the fuel injection system.
Thanks to all who answer and help. It is greatly appreciated!
Ed

bob t
Posts: 2
Joined: Tue Sep 27, 2016 5:33 pm
Location: Larsen, Wi
Motorcycle: 1985 1200 GL LTD CFI

Re: fuel system shuts bike down

Postby bob t » Wed Sep 28, 2016 8:57 pm

Rednaxs60 wrote:Interesting issue. Check the venting as Rusty Bike mentions. If the bike shuts down at low RPM and the fuel light comes on, could also be electrical, especially since you mention the bike won't start again until some 30 to 45 minutes have passed. The only item(s) on the bike that would need time to cool down are the coils.

Next time you have the bike started, hit the kill switch and see if the fuel light comes on when it shuts down. If it does, then the system is probably working correctly. Will check mine as well for this and get back to you.

cheers

That would be Great. Thanks., are the coils the silver block plug ins by the fuses, on top of the tank?

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paneled
Posts: 26
Joined: Thu Sep 17, 2015 8:33 am
Location: kansas city mo
Motorcycle: 1986 Goldwing 1200 aspencade sei

Re: fuel system shuts bike down

Postby paneled » Thu Sep 29, 2016 8:42 am

almost sounds like you might have a crank sensor giving up when it gets warm, if the ecm doesn't see
the engine rpm it will shut down fuel and possible spark as well. most fuel injection systems will kill the
feed to the fuel system after the engine stops turning and most systems use the crank sensor for this input.
if your fuel light is on when this happens the ecm or computer will have some lights on giving you a code
the code will give you an idea of where to look for this problem, the ecm or computer is located under the
trunk and the row of lights on it will be on the left side. can`t remember what Honda calls this sensor, but the
rest of the fuel injection world calls it a crank sensor.
86 aspy sei
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Rednaxs60
Posts: 728
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD, 2008 GL1800

Re: fuel system shuts bike down

Postby Rednaxs60 » Thu Sep 29, 2016 8:46 am

The crank sensor is the Ns sensor. It is discontinued, but people have used the sensor from a 1500 successfully, and/or from an earlier 1100. Since only one is used on th LTD/SEi you will have a spare.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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paneled
Posts: 26
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Motorcycle: 1986 Goldwing 1200 aspencade sei

Re: fuel system shuts bike down

Postby paneled » Thu Sep 29, 2016 1:14 pm

I knew it was something like that just couldn`t remember what is was. thanks
86 aspy sei
54 chevy panel truck
68 chevy van
69 chevy van
64 chevy van

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paneled
Posts: 26
Joined: Thu Sep 17, 2015 8:33 am
Location: kansas city mo
Motorcycle: 1986 Goldwing 1200 aspencade sei

Re: fuel system shuts bike down

Postby paneled » Thu Sep 29, 2016 1:36 pm

here in the automotive world of fuel injection when one will not start
first I check to see if there is spark, second I check to see if there is fuel
pressure and third I check to see if the injector is being fired by the ecm
the last check is done with a device called a noid light, unplug one injector
and plug this light in and crank the engine if it blinks the ecm is firing the
injectors. if there is no fuel pressure then I look into why, is the pump getting
power and does it have a good ground, usually is powered by a relay activated
by the ecm. is the ecm commanding the relay to operate, if so is the relay sending
power to the pump. hope this helps


86 aspy sei
54 chevy panel truck
68 chevy van
69 chevy van
64 chevy van


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