dead spot off the bottom


Information and questions on GL1500 Goldwings (1988-2000)
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DougR
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Location: Cameron Park, CA
Motorcycle: 1990 GL1500SE

dead spot off the bottom

Postby DougR » Thu Sep 29, 2011 2:05 pm



Is it common to have hesitation / deadspots while accelerating? It is right off the bottom of the throttle



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WingAdmin
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Re: dead spot off the bottom

Postby WingAdmin » Thu Sep 29, 2011 9:01 pm

It's unfortunately common, but not normal. It's generally due to mis-adjusted, dirty, or otherwise incorrectly operating carburetors.

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robb
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Motorcycle: 1989 Honda GL1500 Aspencade

Re: dead spot off the bottom

Postby robb » Fri Sep 30, 2011 1:39 pm

Can also happen when replacing plugs. Putting wire back on and plug hits the connector and pushes it back into the cap. It will idle and run Ok but can't handle the high rpm under full accelleration. Culprit # 2 is crack in tubing at head vacumn ports.

t205843
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Re: dead spot off the bottom

Postby t205843 » Sat Oct 01, 2011 6:05 pm

I have the same problem but with CFI 85 Goldwing LTD. Just got the bike and TPS (throttle position sensor) is no longer available from Honda. Not that I'm sure that is the problem. Erratic idle when warm and lag requiring more throttle to get started. OK when cold and on the road above 1/4 throttle. Any suggestions on where to start? Thank you. :?

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vtxcandyred
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Motorcycle: 1993 Honda Goldwing SE

Re: dead spot off the bottom

Postby vtxcandyred » Sat Oct 01, 2011 6:26 pm

Try to keep the idle above idle. That is keep the acceleration above what you normally would when you accelerate.

tazzmann1952
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Motorcycle: 1991 GL1500 SE

Re: dead spot off the bottom

Postby tazzmann1952 » Sun Oct 02, 2011 8:53 am

Checked with a friend that worked for Honda and he never heard of a t sensor breaking down.
He said to check the injectors. have them properly cleaned.
Bad gas will plug them very fast just as in a car.
Gas has a wax in it that lube the valves and could plug injectors.

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DougR
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Re: dead spot off the bottom

Postby DougR » Mon Oct 03, 2011 7:44 pm

Do I have carbs or injectors? I thought I had carbs on the 1990? Maybe I should just buy some injector cleaner and run it through? The dead spot is right at the bottom, cold or hot, unless I have the choke on...then the bottom is much higher of course

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vtxcandyred
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Re: dead spot off the bottom

Postby vtxcandyred » Mon Oct 03, 2011 8:21 pm

DougR wrote:Do I have carbs or injectors? I thought I had carbs on the 1990? Maybe I should just buy some injector cleaner and run it through? The dead spot is right at the bottom, cold or hot, unless I have the choke on...then the bottom is much higher of course

If you have an SE it SHOULD be carburated. My 93 SE is.

philmckinley
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Re: dead spot off the bottom

Postby philmckinley » Fri Oct 07, 2011 7:03 pm

Randakk says one cause is a bad air cutoff valve. will try to post link:

http://www.randakks.com/TechTip3.htm

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landisr
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Location: Gilbert, AZ
Motorcycle: 1976 GL1000
1994 GL1500A

Re: dead spot off the bottom

Postby landisr » Fri Oct 07, 2011 9:01 pm

There was a service bulletin from Honda regarding this problem on at least the '88 models. Not sure if it applies to the '90 bikes. Check elsewhere on this site for details.

Ron in MI

PS. Here 'tis: http://goldwingdocs.com/Docs/Honda%20Go ... -33FCB.pdf
Beam me up, Scotty. There's no intelligent life down here.

bustedwing
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Re: dead spot off the bottom

Postby bustedwing » Thu Dec 01, 2011 10:51 am

Had the same problem with an 88 that had sat for a few years. The more I ran clean gas thru it the better it got, but it took a long time and somewhat irritating.Sea Foam may help to clean out the ports a little faster.


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