Idle problems


Information and questions on GL1100 Goldwings (1980-1983)
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Afterphil
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Idle problems

Post by Afterphil » Tue Jun 05, 2018 7:40 pm



Thanks for all the recommendations on a new headlight and mirrors. I pulled the carbs and cleaned everything to shiny and new last night and solved the issue with my ‘81 only running under throttle, no idle. Now I’m running into the bike idling really high (2k-3k) then dropping down to a 1000-1100 and eventually working it’s way back up. I can slow the idle with the set screw, but if I set it more than a half turn it will slow until it dies. I’ve pulled the fuel pump, cleaned it thoroughly and it seems to be working alright. Any suggestions would be appreciated.



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RBGERSON
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had every year from 75 to 83

Re: Idle problems

Post by RBGERSON » Wed Jun 06, 2018 7:38 am

Did you polish teh slides?? if not if they stick will cause high idle
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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Afterphil
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Re: Idle problems

Post by Afterphil » Wed Jun 06, 2018 8:00 am

RBGERSON wrote:
Wed Jun 06, 2018 7:38 am
Did you polish teh slides?? if not if they stick will cause high idle
I did polish the slides. I’m wondering if it’s the timing belts.

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RBGERSON
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had every year from 75 to 83

Re: Idle problems

Post by RBGERSON » Wed Jun 06, 2018 8:26 am

Not likely..off belts = poor running but not idle issues..things to check, bell housing spring binding?, vacuum leaks in intakes or carb shafts, throttle cables sticking/routing..but slides sticking number one..because of the creeping back up..
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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WingAdmin
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Re: Idle problems

Post by WingAdmin » Wed Jun 06, 2018 8:27 am

Afterphil wrote:
Wed Jun 06, 2018 8:00 am
RBGERSON wrote:
Wed Jun 06, 2018 7:38 am
Did you polish teh slides?? if not if they stick will cause high idle
I did polish the slides. I’m wondering if it’s the timing belts.
Timing belts won't cause this. Timing belts are either working perfectly, or not at all (i.e. BANG, engine stops). If they were installed incorrectly (i.e. a tooth off) you can get a rough-running engine, but this type of RPM cycling is almost always carburetor/air related. Often a lean mixture can cause this, either from incorrect adjustment, or a clogged jet. Being that your idle jets were already clogged (it wouldn't run at idle, only under throttle), I would bet on clogged jets.

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virgilmobile
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Re: Idle problems

Post by virgilmobile » Wed Jun 06, 2018 9:04 am

I heard a wing idling at 1500rpm on one cylinder..
I'd suggest a quick check.
Fire it up from cold and try to keep it around 1000rpm if possible for 4-6 seconds the shut it down.
Very lightly tap each header...Warm is a firing cylinder..cold is a dead one.
This can lead you to which one is the problem.
Problems...Wrong float level,plugged slow speed circuit,vacuum leak at the mount,very bad sync.
Bout the same answer as everybody else.

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Afterphil
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Re: Idle problems

Post by Afterphil » Mon Jun 11, 2018 6:29 pm

We’ve checked all of the current suggestions and haven’t been able to find the cause. I found an article about a vacuum accelerator(?) not being essential, so we disconnected the line and plugged it. That seemed to improve things a bit, but the idle is still
fluctuating and/or dying. Any over ideas?

Thanks in advance.

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Maz
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Re: Idle problems

Post by Maz » Tue Jun 12, 2018 1:03 am

Afterphil wrote:
Mon Jun 11, 2018 6:29 pm
We’ve checked all of the current suggestions and haven’t been able to find the cause. I found an article about a vacuum accelerator(?) not being essential, so we disconnected the line and plugged it. That seemed to improve things a bit, but the idle is still
fluctuating and/or dying. Any over ideas?

Thanks in advance.
As others have said, clogged jets or vacuum leak. Try spraying around the intakes with starting fluid or an unlit propane torch. Any leaks should show up with increased rpm. Keep a fire extinguisher handy.
Maz
Ironically, Common Sense is the LEAST common of all senses!

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Afterphil
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Re: Idle problems

Post by Afterphil » Tue Jun 12, 2018 1:17 pm

As others have said, clogged jets or vacuum leak. Try spraying around the intakes with starting fluid or an unlit propane torch. Any leaks should show up with increased rpm. Keep a fire extinguisher handy.
Maz
I've tried this with anywhere a vacuum leak could be present and didn't have any rpm increase. I'm planning to take the carbs off again soon to apply the mod I found here: viewtopic.php?f=11&t=5675. I'll pull them apart and check for clogged jets again and keep everyone updated.



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