Really weird problem


Information and questions on GL1100 Goldwings (1980-1983)
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warnett
Posts: 67
Joined: Thu Oct 25, 2012 11:19 pm
Location: Stockdale, Texas
Motorcycle: 1982 gl1100 aspencade

Really weird problem

Postby warnett » Wed Aug 28, 2013 3:26 pm



1983 gl11oo. Hard to explain. Cuts out, misses at 3500 to 4500 rpm when leveled out. I can power throught it from a start. Starts and runs great except for this problem. If you stay on it, it will finaly get throught it and run great but right in that range it spits and sputters. No matter what gear. Tryed differant carb set same thing. Swaped coil pak same thing. Changed pulse gen. same thing. When it does this can see black smoke from exhaust from cyl 1 and 3. Plugs 1 and 3 show a small carbon spot on Porcelain on the same place. Going crazy trying to fix this problem.



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virgilmobile
Posts: 7647
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: Really weird problem

Postby virgilmobile » Wed Aug 28, 2013 4:08 pm

Initial thoughts....
Ignition timing...there's 2 parts to the auto advance system...mechanical and vacuum.
The mechanical takes it from 10*BTDC to about 23*BTDC then the vacuum will pull it to around 38* BTDC at 3500 rpm...The manual has the test for that.
I usually vacuum test the canister first for leaks then mark the cam gear and strobe it.

While your there.....

Valve timing....just one tooth off on one belt will keep the engine running...it just won't aspirate properly,eg run bad on one side...The marks at the cam/casting must be spot on..Ya gotta get on your knees to get a level look at it....

Vacuum slides in the carb sticking....even one sticking will puke up the performance a bunch.Stick a angled inspection mirror into the bottom of the plenum...eyeball each slide and watch to see if it does actually pop up and fall as you rap the throttle...There movement is proportional to air flow.

lastly,and I do mean very remote,is a restriction in the exhaust on the 'bad' side...I have seen a restriction in the header inner thermal liner.It swelled almost shut.

dkorody
Posts: 29
Joined: Thu Jul 07, 2011 1:09 am
Location: weirdale saskatchewan Canada
Motorcycle: 83 wing interstate

Re: Really weird problem

Postby dkorody » Wed Aug 28, 2013 11:36 pm

ive had the same problem both times it was plug wires.

dkorody
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Location: weirdale saskatchewan Canada
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Re: Really weird problem

Postby dkorody » Wed Aug 28, 2013 11:43 pm

I w could be as thinking of a different engine when I said plug wires but it still could be what does your plugs look like?

warnett
Posts: 67
Joined: Thu Oct 25, 2012 11:19 pm
Location: Stockdale, Texas
Motorcycle: 1982 gl1100 aspencade

Re: Really weird problem

Postby warnett » Thu Aug 29, 2013 7:58 am

dkorody Plug wires? Well it can't hurt to try it. Like I said bothe plugs on that side have a carbon spot on them.

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littlebeaver
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Location: Kansas City, Kansas
Motorcycle: 1981 gl 1100 I , 79 Yamaha XS11
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Re: Really weird problem

Postby littlebeaver » Fri Aug 30, 2013 9:37 am

A good set of plug caps too might be good,, I would differently check your timing too after you replace the plugs... :D

warnett
Posts: 67
Joined: Thu Oct 25, 2012 11:19 pm
Location: Stockdale, Texas
Motorcycle: 1982 gl1100 aspencade

Re: Really weird problem

Postby warnett » Fri Aug 30, 2013 11:16 am

What blows my mind is above that rpm it is badass.

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virgilmobile
Posts: 7647
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: Really weird problem

Postby virgilmobile » Fri Aug 30, 2013 11:32 am

Well that should eliminate the complete ignition system and timing.
It just leaves the carbs.

warnett
Posts: 67
Joined: Thu Oct 25, 2012 11:19 pm
Location: Stockdale, Texas
Motorcycle: 1982 gl1100 aspencade

Re: Really weird problem

Postby warnett » Fri Aug 30, 2013 1:06 pm

except for the fact I put another set of carbs on it and it acted exactly the same way.

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80-GL100-INT
Posts: 162
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Location: Bedford, In.
Motorcycle: 1980 GL1100I Interstate (current)
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Re: Really weird problem

Postby 80-GL100-INT » Fri Aug 30, 2013 5:07 pm

warnett wrote:except for the fact I put another set of carbs on it and it acted exactly the same way.


First of all, Absolutely Not Being a Smart A$$ :o . Just something to think about...

If every GL1000, 1100 of these years have the exact same carb. issues. Then why would it not act the same way by simply changing them? Unless you know 100% beyond a shadow of doubt that the new set was "professionally rebuilt". Something as simple as a being a 1/4 mm off setting a float on 1 carb. can cause you to pull your hair out. If there is one thing I have learned from years of experience, trial and error, and especially this forum, these carbs. are very temperamental.

Don't simply take for granted "I changed the carbs., so it's not them..."

Other things in this forum I have seen to think about. Timing belt a tooth off, valve adjustment (again a temperamental adjustment on these engines).
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hondo
Posts: 12
Joined: Fri Jul 15, 2011 1:54 pm
Location: Surrey Bc.
Motorcycle: 1981 gl 1100 1981 silverwing 500 interstate

Re: Really weird problem

Postby hondo » Fri Aug 30, 2013 6:11 pm

Just a suggestion, but if you have access to other carbs you might also have access to another machine which you could try your carbs on. This would at least tell you if they are a problem or there is another gremlin in the works. Try this reverse swap with other parts be they ignition or fuel until the problem travels with whatever you swap. If you can,t find it this way then your problem must be in the timming or something mechanical althougth mechanical seems improbable if it will clear itself in time as you ride it. I have an 81 goldwing with 40 thousand kilometers on it and since I have owned it I have had not problems except plugged carb circuits as it was shut down improperly 14 years ago. Runs like a top now. Good luck on your quest. hondo

warnett
Posts: 67
Joined: Thu Oct 25, 2012 11:19 pm
Location: Stockdale, Texas
Motorcycle: 1982 gl1100 aspencade

Re: Really weird problem

Postby warnett » Fri Aug 30, 2013 11:17 pm

That was my next step hondo. Doing a reverse. I hope I wasn't sounding like a smart ass. Didn't mean to if I was. Its just nothing changes no matter what I do. The problem stay the same at the same rpm. I'm going to go back through everything and swap in reverse. Recheck timing valves every thing. Thanks to all you guys.

dkorody
Posts: 29
Joined: Thu Jul 07, 2011 1:09 am
Location: weirdale saskatchewan Canada
Motorcycle: 83 wing interstate

Re: Really weird problem

Postby dkorody » Sat Aug 31, 2013 12:57 am

yesterday I had a miss it would clear up after 4000 rpm checked plugs they all looked good except one ,it was a little brown changed plugs runs good now I would say ignition plugs wires caps coil try switching coils and wires side to side

dwight007fchr
Posts: 430
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: Really weird problem

Postby dwight007fchr » Sat Aug 31, 2013 8:53 pm

warnett wrote:1983 gl11oo. Hard to explain. Cuts out, misses at 3500 to 4500 rpm when leveled out. I can power throught it from a start. Starts and runs great except for this problem. If you stay on it, it will finaly get throught it and run great but right in that range it spits and sputters. No matter what gear. Tryed differant carb set same thing. Swaped coil pak same thing. Changed pulse gen. same thing. When it does this can see black smoke from exhaust from cyl 1 and 3. Plugs 1 and 3 show a small carbon spot on Porcelain on the same place. Going crazy trying to fix this problem.



Warnett......Man, I am having the same problem with my 83 GL1100, and it is driving me crazy too. All spring and summer I have been fighting these gremlins, testing and trying to fix everything. She cranks right up, idles great, and when I dog her kinda hard from 0-70 mph, she seems to getty-up great, and she seems to cruise fine from 55-70. But when I drop speed down from say 45 down to 10mph, she has this annoying miss or "flutter", kinda seems like she is getting gas-starved, or maybe losing spark in this range. I have tested all plug wires, put new plugs in, replaced a cracked coil, installed a new battery, new timing belt, fresh non-ethanol gas, did a compression test (all cylinders great). Today I checked the gas flow going to the fuel pump.....the filter is clean, and gas flows fine. I took the fuel pump apart, and all the diaphrams looked fine. She ran fine last summer, and I did have SeaFoam in the full gas tank all winter, so I am thinking that maybe the SeaFoam caused some gum to loosen up in the carbs, and maybe something is clogged up in one or two of the carbs. Thats my only guess now......so, I guess I have to tear the carbs off sometime soon.

But I hear you totally, it is so frustrating to do alot of work on fixes that end up not solving the problem. Keep us posted if you finally figure out your (our) problem.

Good luck.

warnett
Posts: 67
Joined: Thu Oct 25, 2012 11:19 pm
Location: Stockdale, Texas
Motorcycle: 1982 gl1100 aspencade

Re: Really weird problem

Postby warnett » Sat Aug 31, 2013 9:50 pm

Will do 007 If I ever figure it out

dwight007fchr
Posts: 430
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: Really weird problem

Postby dwight007fchr » Sun Sep 01, 2013 6:42 am

warnett wrote:Will do 007 If I ever figure it out


Warnett.......OK Special Agent 006. In the mean time, I will keep working on the sidewinder missiles and rear tac discharge units, and hope you have the rocket engines tied to the flux capacitors for our next test on the salt flats.

mikie 1954
Posts: 27
Joined: Tue Jul 31, 2012 7:53 pm
Location: CALIENTE, CA
Motorcycle: 1983 GL1100I INTESTATE

Re: Really weird problem

Postby mikie 1954 » Mon Sep 02, 2013 12:42 pm

My dad had a 1972 GMC pickup once that was doing the same thing right after a tune up, they finally fond out that a new spark plug was bad. Drove him crazy for a while until they fond it.maybe one or more of yours are bad?

dwight007fchr
Posts: 430
Joined: Mon Nov 15, 2010 9:43 pm
Location: Culpeper, Va
Motorcycle: 1983 1100 Goldwing Interstate

Re: Really weird problem

Postby dwight007fchr » Mon Sep 02, 2013 5:05 pm

Mikie1854......Well, Im having the same issue, and put new plugs in also, but the problem is still there......Im thinking carb problems, and I just didnt want to have to pull them off......Im gonna see if maybe I can just open the jets say a quarter turn on all 4 carbs and see if that helps any.




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