82 Interstate spark question


Information and questions on GL1100 Goldwings (1980-1983)
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lacanars
Posts: 42
Joined: Mon Apr 16, 2012 11:46 am
Location: Oakland, NE
Motorcycle: Current: 1982 GL1100I Interstate
Previous:
1981 Honda CM400C
1978 Yamaha XS400

82 Interstate spark question

Post by lacanars » Fri Jun 07, 2013 7:58 pm



Here's the backround, I bought the bike a year ago with 78,000 miles on it, shortly after it started running rough, traced it down to a fouled spark plug on the #1 cyl. Replaced all the plugs with NGK's, now a year later and 6 to 7 thousand miles and it does it again, once again it was the #1 cyl. Is it coincidence or is there a reason it is the same cyl. that fouled the plug? Here is the best picture I could get of it. Looks black and it is wet from about a 25 mile ride to get home.
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IAAustin
Posts: 46
Joined: Thu Jul 26, 2012 3:14 pm
Location: Waukon, IOWA
Motorcycle: 1982 GL1100

Re: 82 Interstate spark question

Post by IAAustin » Sat Jun 08, 2013 6:50 am

Possibly a weak spark not properly burning the air/fuel mix. How does the inside of the cyl.#1 wire look? Does it smell like gas or is it oil?

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lacanars
Posts: 42
Joined: Mon Apr 16, 2012 11:46 am
Location: Oakland, NE
Motorcycle: Current: 1982 GL1100I Interstate
Previous:
1981 Honda CM400C
1978 Yamaha XS400

Re: 82 Interstate spark question

Post by lacanars » Sat Jun 08, 2013 8:57 am

The wire looks ok, just as the other 3, I know it is fuel on it due to it not firing for the 25 miles I rode it to get home. I held on the the 3 good plugs I pulled out last year, put one in and it fires right up and runs fine, I guess what I am wondering is why would #1 go bad both times? Is it the way the carbs work, would #1 possibly catch all the junk flushed out of the fuel system from the winter storage more than the others? Is a bad coil or wire causing that one to burn up faster than the others? Is there something elese that I should be looking at that this is an indication of, I don't want to have something go out or break down and find out I could have fixed it before knowing that the plug was telling me something was wrong and I just replaced the plugs and did not fix the problem.

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RBGERSON
Posts: 2849
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: 82 Interstate spark question

Post by RBGERSON » Sat Jun 08, 2013 9:03 am

no carb issue for #1 so check cap, wire, connections on both, resistor inside the cap..some years have them I forget which earlier..for sure.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

IAAustin
Posts: 46
Joined: Thu Jul 26, 2012 3:14 pm
Location: Waukon, IOWA
Motorcycle: 1982 GL1100

Re: 82 Interstate spark question

Post by IAAustin » Sat Jun 08, 2013 8:19 pm

If it is not oil getting onto the plugs from blow-by preventing proper ignition it may be time to test coils..I can't really think of anything else. If you don't have access to a service manual do a search for coil test on the site, I see there are a few threads on the subject. Seems popular to put on a Dodge Neon coil for replacement. And of course this is all with assuming no carb issues. Keep us posted and good luck!



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