Bike runs on two cylinders after warmup - Steve Saunders Goldwing Forums

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post #1 of 39 (permalink) Old 06-20-2019, 06:14 PM Thread Starter
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J Clark's Avatar
 
Join Date: Jun 2019
Location: McDonald County, Missouri
Year: 1983
Model: GL1100 Interstate
Posts: 20
Bike runs on two cylinders after warmup

I have a 1983 interstate that for the last year been trying to find problem
Here is what I have done so far.replaced coils ,spark units ,reworked carbs, and reset valves,new hotter sparkplugs,spark plug wires, new fuel pump and filter and gas lines.steam cleaned fuel tank. New brake pads and caliper kits, tires , cleaned all connections replased lights for led and new flasher.
Recleared old paint..
It runs good for maybe 20 miles on a warm day and starts missing loses power when I let off throttle and throttle back it tries to come back but will not I stop and let it cool off and it come back.but when the temp outside is at or below 74 it will not breakdown this has me stumped and I also had super cycle in Joplin mo try to find problem and no luck he pressure tested pump it was right and tested all he knew to test.but don't think he tested final coil to see what it was doing.any ideas please I have tried everything I can think of
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post #2 of 39 (permalink) Old 06-20-2019, 06:55 PM
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Location: Florence, KY
Year: 1993
Make: Honda
Model: GL1500A
Posts: 261
Damn! And I would have thought for sure the clear coat would have solved the problem. ;-) I don't know anything about the '83 but I'm pretty sure that you problem is electronic. The reason I say that is because when the temperature is cool, you don't have this problem at all, Some electronic components will lose internal connections when they heat up. Like I said, I don't know anything about you particular model but it is something in the ignition circuit that only supplies a signal to two cylinders. Does your bike have a pulse generator or a crank/cam position sensor? I am thinking that you have two of these and one is on the fritz. I'm sure someone will be along shortly with a lot better information than this but it may give you a place to start. When it starts to do this again, before it has a chance to cool down, check which plugs are not getting spark. This will at least narrow down your search. If you have an IR thermometer, this will be able to tell you which cylinders are not firing by pointing it at the exhaust pipes close to the heads. Sorry I can't be more help than this.
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post #3 of 39 (permalink) Old 06-20-2019, 07:19 PM
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Location: Glendale, Arizona, USA
Model: 1987 GL1200 Interstate 290,000 miles
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My first guess would be the PGs too.

They're no longer available new, but they are in the back of the engine and there should be a plug by the battery for testing.

https://shop.westernhonda.com/fiche_...983&fveh=13036

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post #4 of 39 (permalink) Old 06-20-2019, 11:06 PM Thread Starter
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Join Date: Jun 2019
Location: McDonald County, Missouri
Year: 1983
Model: GL1100 Interstate
Posts: 20
Yes I can one used at west 60 cycle west of neosho missouri they have allot of holdings there and they test all parts before I get it
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post #5 of 39 (permalink) Old 06-21-2019, 01:54 AM
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Model: 1987 GL1200 Interstate 290,000 miles
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Be cautious, yours will probably test good when cold.

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post #6 of 39 (permalink) Old 06-21-2019, 02:46 AM
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Actually I am not familiar with your bike, but on GL1500s the gas cap vent can create a similar problem like yours.
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post #7 of 39 (permalink) Old 06-21-2019, 06:34 AM
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Year: 1982
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I was thinking that too Erdeniz, but why only two cylinders? J Clark didn't mention which two cylinders drop out, but I'd bet that they share the same coil and PG. When it comes to heat-related failures, PGs and coils are the usual suspects.

Bruce

Current Bikes:
---------------------
74 CB750 K4
77 CB550 K3
82 CM250C
82 GL1100 Interstate w/ Auburn Gemini (doublewide) Sidecar

Past Bikes:
------------------
What?? SELL a bike??

------------------
Can I have a motorcycle when I get old enough?
If you take care of it.
What do you have to do?
Lots of things. You've been watching me.
Will you show me all of them?
Sure.
Is it hard?
Not if you have the right attitudes. Its having the right attitudes that's hard.


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post #8 of 39 (permalink) Old 06-21-2019, 01:13 PM Thread Starter
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Location: McDonald County, Missouri
Year: 1983
Model: GL1100 Interstate
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The right bank 3 and 1 drops out
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post #9 of 39 (permalink) Old 06-22-2019, 10:47 AM Thread Starter
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Location: McDonald County, Missouri
Year: 1983
Model: GL1100 Interstate
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Final part for ignition on my 83 interstate

Took bike out last night and it started miss firing on the right bank again all the work I have done did help some but this part...palse generator and the starter silinode I got off bangood.com did hold up it would just click,so got a good used one came off a bike that just came in for half the new price, played less for these them what everyone wanted. Now going to my shop to put this together and have bike ready for the trip to Galveston TX in two weeks.
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post #10 of 39 (permalink) Old 06-22-2019, 11:54 AM
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@J Clark


I merged your new thread into the original thread....
please do not start new threads on the same topic, it causes too much confusion for us to be able to look back and see what has already been discussed.

~ John


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