Spark Plugs fouling out


Information and questions on GL1100 Goldwings (1980-1983)
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fischerj
Posts: 37
Joined: Tue Aug 24, 2010 12:44 pm
Location: Baton Rouge, LA
Motorcycle: 1983 GL1100 A Aspencade

Spark Plugs fouling out

Postby fischerj » Mon Oct 17, 2011 7:50 am



Just had the head gaskets replaced because coolant was flowing between cylinders. Coolant level has stabilized now. That problem solved.

Now the spark plug are fouling out and bike is running very rough. I put in a new set of plugs about a week ago and it is doing it again. When I replaced the plugs, they were black and oily. Seems to me that oil is getting to them some how. Any ideas?

Thanks,

Jay



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virgilmobile
Posts: 7663
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Spark Plugs fouling out

Postby virgilmobile » Mon Oct 17, 2011 10:26 am

Does it beller out blue smoke out the tail pipe ? If yes,then yes oil is getting into the combustion chamber(valve seals,guides,etc.)
If not or black smoke,then it's overloading on fuel.Floats stuck,slides stuck,etc.

Smell the plugs.Are they gasy or oily . Either one will produce a black sooty residue.

Is it all 4 cylinders?
Is it equal amount of contaminate on each plug?

Bloodbeard
Posts: 2
Joined: Sat Sep 24, 2011 4:10 pm
Location: Falling Waters, WV
Motorcycle: 1982 GL1100A

Re: Spark Plugs fouling out

Postby Bloodbeard » Mon Oct 17, 2011 4:20 pm

Did you have coolant in your oil? I just did a water pump replacement and the overflow of coolant in the oil came out the crankcase vent and hosed my air filter. Sticky gooey mess might make it run rich. I was too busy with the lower end to check the air filter.

fischerj
Posts: 37
Joined: Tue Aug 24, 2010 12:44 pm
Location: Baton Rouge, LA
Motorcycle: 1983 GL1100 A Aspencade

Re: Spark Plugs fouling out

Postby fischerj » Wed Oct 19, 2011 4:33 pm

I changed spark plugs today and the one on the front left smells like gas and looks like the tip is burnt (black); where as the others don't smell and the tip is gray. These plugs are only two weeks old.

What does that mean?

Thanks in advance for any ideas on what is causing this.

Jay

User avatar
virgilmobile
Posts: 7663
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Spark Plugs fouling out

Postby virgilmobile » Thu Oct 20, 2011 8:25 am

A good observation.The gray tip is about normal.The gasy one is more fuel than the cylinder can burn.

One possibility.Were the belts changed???A tooth off on that side will cause valve timing errors and a poor running cylinder.

On the side with the fouled plug,do a compression test of both cylinders.Expect from 120-180 psi.The number is not as important as how close they match.Measurements more than 5-7 psi can be annoying.20 psi or more IS a problem.

If the compression is OK,check the spark.You have spare plugs,pull the wire off,put on the plug and start the engine.It will run on 3 cylinders(kinda)long enough to see what the spark looks like.Compare it to a good cylinder.

If the spark and compression are OK,It must be fuel supply to the cylinder.Perhaps a mis-adjusted carb, stuck float or vacuum slide stuck wide open.




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