1983 1100 carb issue


Information and questions on GL1100 Goldwings (1980-1983)
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sanford
Posts: 4
Joined: Tue Apr 13, 2010 7:47 pm
Location: Wayne nj
Motorcycle: 1983 goldwing interstate 1100cc

1983 1100 carb issue

Postby sanford » Thu Jun 10, 2010 9:21 pm



I was wondering if anyone could tell me whats causing #1 cyl. intake elbow to be ice cold after bike is warmed up. Here's what I've done....cleaned and rebuilt carbs, had a problem on #2 cyl, removed and fixed that carb. Took for a ride and noticed condensation on #1 cyl. elbow, the bike seemed to be dragging one cyl. along for the ride. Pulled plug wire on #1 and it made no noticable change. I think this is being caused by the air cut off valve stuck in open position. I replaced all air valves and acc. pump during rebuild. Another thing I noticed is if any cyls. are not getting fuel, that bank will smoke like a chiminey. Any help would be appreciated....sanford



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MJSantos
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Location: York, Pa
Motorcycle: 1983 GL1100I
1983 GL1100 Custom
2002 Shadow
1983 Honda Magna V45
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Re: 1983 1100 carb issue

Postby MJSantos » Fri Jun 11, 2010 7:16 am

Interesting, have you done a compression check by chance? I know the rest of the folks will chime in on this one. If you can check the compression with the throttle wide open. Do it a couple of times then squirt some Marvel Mystery oil in the cylinders and run the test again. See what kind of readings you get.

sanford
Posts: 4
Joined: Tue Apr 13, 2010 7:47 pm
Location: Wayne nj
Motorcycle: 1983 goldwing interstate 1100cc

Re: 1983 1100 carb issue

Postby sanford » Fri Jun 11, 2010 9:30 pm

I have done a compression test on it and all four are @ 155lbs.without shooting oil in cyls.. The smoking from that bank I know is from #1 not getting fuel, it's sucking oil through valve seals. #1 was running ok before I removed carbs the 2nd time to fix #2 cyl.(loose idle jet). I think while blowing out the jets I must have pushed the air valve back into the non wear area of the seat and the spring can't push it back. This is why I'm asking if a stuck open air valve would cause the manifold elbow to be cold and condensate after bike is warm. I also checked for external air leaks with carb cleaner and propane (no leaks found). If I put the propane hose in front of #1 inside the manifold it starts kicking in. Hope this is a little more helpful info

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MJSantos
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Joined: Wed Dec 16, 2009 9:19 pm
Location: York, Pa
Motorcycle: 1983 GL1100I
1983 GL1100 Custom
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1983 Honda Magna V45
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Re: 1983 1100 carb issue

Postby MJSantos » Sat Jun 12, 2010 4:35 pm

If I recall right the air cutoff valves are suppose to stop the air flow to prevent backfire during rapid deceleration. That being said I would tend to believe that one is stuck causing that cylinder to run rich. Cool mixture flowing through the intake tube an icing. Looks like another pull of the carbs to check this out.

zvacman
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Location: Petoskey, MI
Motorcycle: 1982 GL1100 Interstate

Re: 1983 1100 carb issue

Postby zvacman » Sat Jun 12, 2010 7:21 pm

I just finished a rebuild of the carbs on my 82. When I went to sync the carbs I adjusted the rpm's to 1000 and got them all to about 10lbs. All of this without the cables hooked up. After dialing them all in I revved the engine a couple of times and the idle went up to 3000 and stayed there. If I manually almost force the linkage I can get it back down to 1000. Is there something with having the cables hooked up that will return my idle to 1000? I don't want to hook them up if I need to pull the carbs again.

Thanks, Z

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WingAdmin
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Re: 1983 1100 carb issue

Postby WingAdmin » Sat Jun 12, 2010 7:48 pm

Anytime you have a decrease in pressure, you have a decrease in temperature. The evaporation of fuel also causes a temperature drop. So an extra-cold intake runner could be an excess of vacuum, caused by a blockage or malfunctioning/improperly adjusted throttle slide, or too much fuel being evaporated into the intake air by the carburetor.

sanford
Posts: 4
Joined: Tue Apr 13, 2010 7:47 pm
Location: Wayne nj
Motorcycle: 1983 goldwing interstate 1100cc

Re: 1983 1100 carb issue

Postby sanford » Sat Jun 12, 2010 10:51 pm

Well looks like there coming off again tomorrow...will let you know what i find. Thanks for your input and advice...Great site!!!!




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