GL1200 dies when it gets warm


Information and questions on GL1200 Goldwings (1984-1987)
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filupsd
Posts: 59
Joined: Fri Sep 07, 2012 1:07 pm
Location: Rolla, Missouri
Motorcycle: 1984 GL 1200 Standard

GL1200 dies when it gets warm

Postby filupsd » Tue Mar 11, 2014 7:40 pm



OK it has been a couple of beautiful days here in Missouri. Too warm apparently for my 84 naked wing. I went on a 50 mile ride on Sunday and the bike ran great. Rode to work 10 miles and home yesterday. Toda I went for a lunchtime ride and about 15-20 minutes in the engine began to misfire and wouldn't go up hill. I was low on fuel when it died so I had a friend bring me some gas. 20 minutes later put the gas in and it started right up and I went back to work. This evening I was taking the long way home (80 degrees) and about 15- 20 minutes in it did the same thing about a mile from the house.

Any ideas? Warm Pulse coil? How do I check?.

Thanks
David



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virgilmobile
Posts: 7660
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: GL1200 dies when it gets warm

Postby virgilmobile » Wed Mar 12, 2014 4:41 pm

This is tough to diagnose without hands on at the moment it quits....Sooooo here are a few things you can be prepared for.
Keep a spare spark plug handy.When it won't start,put the spare on a plug wire and see If you do or do not have spark.
If no spark,you will need to check the 4 wire plus to the left of the battery for corrosion.Pulse coil wires.
If there is spark,use your long flat blade screwdriver and open the drain screws on the Carb bowls.verify each one has gas.The fuel pump may die or even the filter plugged.
You'll need to positive confirmation If the bike dies from a fuel or spark problem first... then We can chase down its trouble.

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filupsd
Posts: 59
Joined: Fri Sep 07, 2012 1:07 pm
Location: Rolla, Missouri
Motorcycle: 1984 GL 1200 Standard

Re: GL1200 dies when it gets warm

Postby filupsd » Thu Mar 13, 2014 11:38 am

Thanks virgilmobile,

I did ride to work this morning and it is supposed to warm up this afternoon so may be I can make it fail and try the spark plug thing. I read your post about soldering wires. As I look at the wires to the left of the battery the 3 yellow wires are already done. Are you talking about the other wires that are still in the bracket on the left? I will get the bike in the my shop and clean those contacts up tonight.

It was about 80 degrees when this all happened. The funny thing about this episode is I was riding with a friend and he was on his 85 V65 Sabre and the same thing happened to him a quarter mile later. So he may have to look at his also.

David

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virgilmobile
Posts: 7660
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: GL1200 dies when it gets warm

Postby virgilmobile » Thu Mar 13, 2014 12:52 pm

Yup,the other plug with 4 wires.I just bumped mine and it killed the engine.I found white corrosion on the terminals.They need to have a reallllly good connection .

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filupsd
Posts: 59
Joined: Fri Sep 07, 2012 1:07 pm
Location: Rolla, Missouri
Motorcycle: 1984 GL 1200 Standard

Re: GL1200 dies when it gets warm

Postby filupsd » Tue Mar 18, 2014 1:18 pm

It ended up being the fuel pump we think. After market pump (put on by previous owner) This last time it died the pump started knocking like crazy. Went and bought a generic one put it on and it is running fine so far. I will test it further this week since the snow has melted again.

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virgilmobile
Posts: 7660
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: GL1200 dies when it gets warm

Postby virgilmobile » Tue Mar 18, 2014 2:26 pm

A clattering/knocking pump....The last time I heard that,there were 2 possible problems...I had both on my 84..
If the pump just ticks loud enough to hear,every 3 or 4 seconds at a idle...kinda like tappet noise...the rubber dampener inside is shot...
When they clatter really fast,it means they are not pressurizing or getting any fuel to transfer...
This is usually caused by lack of fuel to the inlet of the pump...eg,fuel lever OFF,plugged tank screen or plugged/near plugged fuel filter...

If the pump is the original design,it gets voltage only as the ignition is firing and then only when the pump demands power to pulse it..(no spark,no fuel pump volts).
Often a replacement pump is simply wired direct to the ignition power wire or accessory line.

rkjmg5757
Posts: 10
Joined: Tue Jan 04, 2011 12:46 am
Location: Litchfield
Motorcycle: 1986 GL1200A

Re: GL1200 dies when it gets warm

Postby rkjmg5757 » Wed Mar 19, 2014 11:34 pm

Had the same problem a couple of springs ago, thought it was the fuel pump as there was a small air bubble in the fuel filter. In the end turned out to be the pulse ignitors, changed these with the timing belts and its been golden.
Good luck, gold wings are too big to push around.
:?

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virgilmobile
Posts: 7660
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: GL1200 dies when it gets warm

Postby virgilmobile » Thu Mar 20, 2014 7:01 am

I've read this too about the pulse coils.It seems to happen on the models where they use the pulse coils by the timing belts.My 84 had them in the rear of he engine like the 1100's.
Is yours carb or fuel injected.?

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filupsd
Posts: 59
Joined: Fri Sep 07, 2012 1:07 pm
Location: Rolla, Missouri
Motorcycle: 1984 GL 1200 Standard

Re: GL1200 dies when it gets warm

Postby filupsd » Thu Mar 20, 2014 10:49 am

OK so I guess I'm praying real hard that it was the fuel pump that I changed out. however it has not been over 60 degrees here since this originally started happening. Pulse Gens on the 84 are a major job from what I understand since they are on the lower back of the engine. It looks to me like you have to remove the rear end of the bike to get to them. That I am definitely not ready to do.

The fuel pump that was on my bike and the one I put back on were/are $50 generic pumps from O'Reiley's. I will go back to the original when I can afford to do so unless someone has a suggestion for a better aftermarket pump. As for wiring, it has two wires coming from under the shelter. The pump does not kick in until I push the starter button. Other than that I'm not sure how it is wired .

David

User avatar
virgilmobile
Posts: 7660
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: GL1200 dies when it gets warm

Postby virgilmobile » Thu Mar 20, 2014 11:08 am

It would be nice to know the number of the pump.Some generics are not suitable for the bike.
Its odd that the pump runs when you push the start button.Is this a pulse pump.Does it go thump thump?
I tried one once.It worked as long as I kept over a half tank of fuel.It didn't have much suction and the output pressure was a bit high..about 7 psi.The carbs take around 3-4 psi.




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