Running rich at idle


Information and questions on GL1500 Goldwings (1988-2000)
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Mtrdrms
Posts: 39
Joined: Mon Sep 19, 2016 5:24 pm
Location: Colebrook, Connecticut
Motorcycle: 1988 GL1500

Running rich at idle

Post by Mtrdrms » Wed Oct 17, 2018 5:49 pm



Howdy fellas,
So a few months ago, I got an 88 running after years of sitting. I cleaned the carbs, tank and replaced all filters and fluids and fuel pump. She fired up and ran great for a few weeks and 500 miles.
Just the other day I noticed a strong gas smell occasionally. Now its all the time at or below 2500 rpms. I dont think its dripping anywhere but I suspect a VERY rich condition at low rpms.
Now the only things I didnt replace that I should have are the fuel valve and spark plugs. Think these could be a problem? Any other ideas? Ill yank the carbs again if I have to but I'd rather not.
Bike has 45k miles.
Please advise.
Thanks!


1988 GL1500

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virgilmobile
Posts: 8699
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: Running rich at idle

Post by virgilmobile » Wed Oct 17, 2018 9:23 pm

Take a moment and read this post.viewtopic.php?f=6&t=46504
The fuel valve may also be leaking and the few drops of gas simply evaporate without a trace.
If you suspect a rich idle,pull a couple of spark plugs...at least one on each side and "read" the plug tip color to determine it's running condition.They should be a light tan..
If it is Rich,they will be dark...There is also an adjustment for that..The idle mixture screws..but if you had weeks and many trouble free miles I doubt this is your problem.
Is the air cleaner clean?

Mtrdrms
Posts: 39
Joined: Mon Sep 19, 2016 5:24 pm
Location: Colebrook, Connecticut
Motorcycle: 1988 GL1500

Re: Running rich at idle

Post by Mtrdrms » Thu Oct 18, 2018 4:14 am

Thanks Virgil. I ordered a fuel valve kit and I will pull a few plugs this afternoon. I just replaced the air filter but those mice can be a problem. I will also check the slides on the carbs and report back.
1988 GL1500

Mtrdrms
Posts: 39
Joined: Mon Sep 19, 2016 5:24 pm
Location: Colebrook, Connecticut
Motorcycle: 1988 GL1500

Re: Running rich at idle

Post by Mtrdrms » Mon Oct 22, 2018 4:49 am

Well I ran the bike today for a while with the air filter off to watch the vacuum slides operate and they do. I did notice that the left acc pump does not squirt - the right does.
Also, when I pulled the gas cap, the tank was pressurized. Is that normal or would that effect anything relating to overfueling?
Thanks


1988 GL1500

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