rough engine on takeoff


Information and questions on GL1500 Goldwings (1988-2000)
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Charlie1Horse
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Joined: Mon Sep 16, 2013 9:35 pm
Location: Jacksonville, Florida
Motorcycle: 1986 GL1200A Aspencade 4Sale soon
1992 GL1500I Interstate

rough engine on takeoff

Postby Charlie1Horse » Wed Dec 23, 2015 11:08 pm



I bought this 1992 GL1500 Interstate a little over a year ago and it ran very well. After about six months it started running rough on takeoff. It idled smoothly and ran well after takeoff. It seemed to have a spark plug that was breaking down so, I replaced the plugs and it started running good again. Then about a thousand miles later it started doing the same thing again. I replaced the plugs again (both times with the proper NGK plugs). Now it is starting to do it again with only about eight or nine hundred miles on the new plugs. Both sets of plugs that were removed looked very good (clean and dry), nearly like new. Does anyone have any suggestions as what might be the problem? I run about half a can of Seafoam in the gas every few tanks. It had 75,000 miles when purchased and now has about 83,000 miles. The PO took really good care and had service done regularly.
Thanks, Russell

Those who say it cannot be done should try not to interrupt those who are doing it.



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Aussie81Interstate
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Location: Penrith Australia
Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: rough engine on takeoff

Postby Aussie81Interstate » Thu Dec 24, 2015 12:16 am

I suppose it could be a lot of different things - but if plugs show as even colour, then I would think one reason it could be clogged accelerator pump jets - which enrichen the mixture when you give the throttle a blip. If they are blocked or not operating evenly would cause a stumble on takeoff.

Does this happen all the time or only from starting dead cold - and after warm up does the same problem happen. What happens if you accelerate quickly while cruising down the road?

Could be a fuel filter/air filter ??
Any other maintenance apart from the plug changes and seafoam treatments?

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Happytrails
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Location: Tarentum, Pennsylvania
Motorcycle: 1991 Goldwing 1500 SE

Re: rough engine on takeoff

Postby Happytrails » Thu Dec 24, 2015 9:39 am

Is it just a slight hesitation when you give it throttle? Ethanol gas is nasty and just not good for our fuel systems/carbs. Suggest adding the recommended amount of Seafoam every tank until your stumble goes away. :D
1991 GL1500 SE Anniversary Edition
Sun Flare Gold Metallic
Vallant Brown Inset

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Fiberthree
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Location: Behind the windshield
Motorcycle: Black 1999 GL1500SE

Re: rough engine on takeoff

Postby Fiberthree » Thu Dec 24, 2015 12:09 pm

What about the plug wires? You said the problem went away after you changed the plugs but came back after time. Removing the wire from the plug and and then putting it back on might temporarily change the connection quality, then after a few hundred miles it creeps up again.
Ed

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ct1500
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Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: rough engine on takeoff

Postby ct1500 » Thu Dec 24, 2015 2:14 pm

You have either plug wire or carb/vacuum component issues.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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Aussie81Interstate
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Location: Penrith Australia
Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: rough engine on takeoff

Postby Aussie81Interstate » Thu Dec 24, 2015 4:50 pm

I'll throw a wildcard in for the problem.

Are the spark plug drain holes clear and open? Each spark plug recess has a small drain hole that allows any water etc to drain out - sometimes if they are blocked by debris, they can fill with water from rain and if blocked can cause the spark plug to short out which causes an intermittent running problem - which could present as hesitation.

That's worth a shot.. :)

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Charlie1Horse
Posts: 165
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Location: Jacksonville, Florida
Motorcycle: 1986 GL1200A Aspencade 4Sale soon
1992 GL1500I Interstate

Re: rough engine on takeoff

Postby Charlie1Horse » Thu Dec 24, 2015 9:38 pm

I haven't changed the filters yet but have fuel filter here and will be getting a new air filter. It may be me but it seems like it is not quite as bad with the choke slightly closed. It does do this all the time, cold or hot, but only does it on normal takeoff. Runs like a bat out of h*** on heavier acceleration. I have other things to work on now, CB radio display replace, repair crack in fairing at CB radio, petcock rebuild (drips in fuel catch tray just enough to keep it wet and stinks), cornering light repair and relay. I will be trying to take care of all these projects after the holidays.
Thanks,
Russell

Those who say it cannot be done should try not to interrupt those who are doing it.

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bstig60
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1999 Virago XV1100LC
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Re: rough engine on takeoff

Postby bstig60 » Thu Jul 28, 2016 9:28 pm

Fuel valve leaking could have something to do with it.... Have you pulled a couple of your plugs to see what they look like? As other have said, my first thought would be a vacuum leak, 2nd would be a bad O ring in one of the pilot screws or a partially plugged pilot jet passage... at any rate it sounds like a lean condition. Plug color will most likely tell that.....
Bill

glenwegener
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Joined: Sat Nov 07, 2015 11:10 am
Location: Starbuck, Minnesota
Motorcycle: 1989 Goldwing 1500

Re: rough engine on takeoff

Postby glenwegener » Fri Jul 29, 2016 7:08 am

Had the same problem. It ended up being a couple of things. One slide in carb was sticking, a few vacuum hoses and whoever had this bike apart before I got it did not tighten the carb to the engine very tight. Oh, 1989 Wing! Hope this helps you out. Mine runs great now. Nova Scotia and back to Minnesota just fine.




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