Searching for answers for 1984 GL1200I, running very poorly - Steve Saunders Goldwing Forums

 5Likes
Reply
 
LinkBack Thread Tools
post #1 of 12 (permalink) Old 09-04-2019, 01:29 PM Thread Starter
Junior Member
 
Join Date: Sep 2019
Location: Toronto, Ontario, Canada
Year: 1984
Make: Honda GL1200I
Model: Interstate
Posts: 6
Searching for answers for 1984 GL1200I, running very poorly

My bike is running on 2 cylinders, 3 & 4 are dead, I'm getting a spark at both cylinders but it seems too weak to fire the plugs. New plugs, swapped out the coils and recently cleaned and rebuilt the carbs. My next step is to test the pulse generators. Does anyone have any other ideas?
James McConnell is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 09-04-2019, 01:52 PM
Moderator
 
Bike...and Dennis's Avatar
 
Join Date: Feb 2009
Location: Glendale, Arizona, USA
Model: 1987 GL1200 Interstate 290,000 miles
Posts: 21,738


Sounds like you're doing it right. Make sure you check all the connectors. I've seen the pins loosen and move on these old plugs.

I'll move this to the Technical Forum. You'll get more help there.
James McConnell likes this.

Why ain't we ridin'?
Bike...and Dennis is offline  
post #3 of 12 (permalink) Old 09-04-2019, 02:48 PM
It aint rocket science
 
DriverRider's Avatar
 
Join Date: Nov 2010
Location: Glastonbury, Connecticut, USA
Model: The best
Posts: 3,802
Quote:
Originally Posted by James McConnell View Post
My bike is running on 2 cylinders, 3 & 4 are dead, I'm getting a spark at both cylinders but it seems too weak to fire the plugs. New plugs, swapped out the coils and recently cleaned and rebuilt the carbs. My next step is to test the pulse generators. Does anyone have any other ideas?
First things first is to do a compression test on the engine. You write that there is spark, I assume that you assume it has to be ignition related because you had the carbs off yet you do have spark. How did you test to verify fuel is getting to and through those carbs to the intake?
James McConnell likes this.

J.D.

There is NO substitute for experience
I'll be around when I come around and not before
Internet myth buster

Starter ride
Rupp
Previous rides
Bultaco
Yamaha 360
Yamaha 650
WS Grand Chapter CT
If local and need help with a 1500, Valkyrie or ST repair please PM
DriverRider is offline  
Sponsored Links
Advertisement
 
post #4 of 12 (permalink) Old 09-04-2019, 06:42 PM Thread Starter
Junior Member
 
Join Date: Sep 2019
Location: Toronto, Ontario, Canada
Year: 1984
Make: Honda GL1200I
Model: Interstate
Posts: 6
Yeah I'm certain the carbs are getting fuel because the spark plugs are soaked and I can smell it in the exhaust. I'm going to check my compression again. I checked it earlier and all cylinders showed 120 or better but the compression gauge I used wasn't a good fit for the bike so I'll check it again with another gauge that I can rely on.
James McConnell is offline  
post #5 of 12 (permalink) Old 09-04-2019, 06:46 PM Thread Starter
Junior Member
 
Join Date: Sep 2019
Location: Toronto, Ontario, Canada
Year: 1984
Make: Honda GL1200I
Model: Interstate
Posts: 6
Thank you, I'll do a thorough check of all the connections when I get back to the bike on the weekend, it's located in another city for now because I didn't want to ride it home in case I might do some serious damage.
James McConnell is offline  
post #6 of 12 (permalink) Old 09-04-2019, 07:00 PM
It aint rocket science
 
DriverRider's Avatar
 
Join Date: Nov 2010
Location: Glastonbury, Connecticut, USA
Model: The best
Posts: 3,802
If fuel is dumping into those cylinders mixture can be too rich to ignite properly which will show as near dead.
Bike...and Dennis likes this.

J.D.

There is NO substitute for experience
I'll be around when I come around and not before
Internet myth buster

Starter ride
Rupp
Previous rides
Bultaco
Yamaha 360
Yamaha 650
WS Grand Chapter CT
If local and need help with a 1500, Valkyrie or ST repair please PM
DriverRider is offline  
post #7 of 12 (permalink) Old 09-12-2019, 07:40 PM
Junior Member
 
msgoodwrench's Avatar
 
Join Date: Nov 2009
Location: Dalton, Ohio, USA
Year: 1983
Make: Honda
Model: GL1100A
Posts: 8
plug wires

One other thing you might check before you start tearing into things too deep; I found on my '83 that very problem. Spark, but not strong spark, causing fouled plug acting like a dead cylinder. What fixed it was taking the plug wire apart from the plug cap. The cap screws onto the wire and that is a missed connection when checking things out. I found that there was corrosion in that joint on my #3 plug. Once that was cleaned up it was good to go! Just something else to check out.
JamesPal likes this.
msgoodwrench is offline  
post #8 of 12 (permalink) Old 09-12-2019, 10:35 PM
Average Goldwing Rider
 
JamesPal's Avatar
 
Join Date: Oct 2009
Location: Bellevue, Washington, USA
Year: 1972, 1981, 1985
Make: CB450, GL1100, GL1200I
Model: K5, Standard, Interstate
Posts: 1,024
I like to do the simple stuff first. Have you tried new plugs? Spark plugs can become gasoline fouled just like being oil fouled. The difference is you can see an oil fouled plug, but spotting a fuel fouled plug is much harder. If the carbs are off try filling the intake track with starting fluid and see if it fires on that cylinder. Just my 2

Jim Palmer
Current rides:
\'85 GL1200I Garage Find
\'81 GL1100 Std
\'72 CB450K5
My \'81 Restoration:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
JamesPal is offline  
post #9 of 12 (permalink) Old 09-13-2019, 09:01 AM Thread Starter
Junior Member
 
Join Date: Sep 2019
Location: Toronto, Ontario, Canada
Year: 1984
Make: Honda GL1200I
Model: Interstate
Posts: 6
Yes cylinder 4 is filling with fuel and not firing. I'm going back to the needle and seat because I think the new ones I installed are simply leaking and allowing fuel into the carbs. Sometimes parts you order online are just not up to the job. I have new parts from a trusted supplier here. I'll recheck my floats and basically start from scratch. I had a local mechanic I trust to check the spark level and do a compression test and everything is as it should be except the over rich problem. I'll know tomorrow. Thanks for your input.
James McConnell is offline  
post #10 of 12 (permalink) Old 09-13-2019, 09:06 AM Thread Starter
Junior Member
 
Join Date: Sep 2019
Location: Toronto, Ontario, Canada
Year: 1984
Make: Honda GL1200I
Model: Interstate
Posts: 6
Yeah I did install new plugs and it took about 5 minutes for number 4 to foul. Starting again this weekend. I think I've narrowed down the problem to poor quality replacement parts, I have parts I can trust to install this weekend. Thanks for your input.
James McConnell is offline  
Reply

  Steve Saunders Goldwing Forums > Forums > Goldwing Technical Forum

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Steve Saunders Goldwing Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome