1984 carb cough? - Steve Saunders Goldwing Forums

 
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post #1 of 10 (permalink) Old 10-12-2010, 08:22 PM Thread Starter
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Last Thursday going for supper, our Wing started making a noise that sounded like a loud lifter or maybe a chunk of the timing belt had come off and was being slapped around a pulley. The noise quit and ran ok? As we made the turn to go on the 4 lane it stumbled hard and wouldn't hardly pull itself. I kept the rpm up and was headed for the next turn off and again it started running fine. We had 2 lights to go through didn't have to stop but was headed for the restaurant parking lot so we could call for a tow if needed. When we final stopped it was missing again but it sounded like it was coughing through one of the carbs.
My wife said lets eat and we'll call if we need to when we get done. YES dear.
When we came out I fired it up and it idled fine?
We drove home and it ran like a champ.
This morning I got ready to go to work and again it was not running right, missing big time. After about 3 minutes all the cylinders chimed in the idle jumped up. I didn't take a chance. When I got home I pulled the plugs and no. 3 was black and soot covered. The rest were tan, gray. After a quick clean and re gap it still ran like crap. Missing in all rpm ranges, plugs were new 800 miles ago. Also found a melted vacuum cap on number 1 carb which I replaced. Couldn't find that one in the book though. Searched the board nothing stood out as being the same will try a compression test ASAP.
Maybe bad fuel.
Weak spark.
????
What I'm looking for is a direction to head. Seafoam first
Any help would really be appreciated
It has 64,000+ miles, it does use a little oil added maybe 6 oz all summer along with a pint of anti freeze. These were added over the course of the summer season, maybe somewhere north of 1,000 miles.


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post #2 of 10 (permalink) Old 10-13-2010, 05:50 AM
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I would look for something causing #3 to loose spark. It would have to be somewhere between the coil and the plug since #4 is apparently still firing. Could be a cracked coil tower, bad wire or plug cap.

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post #3 of 10 (permalink) Old 10-13-2010, 10:11 AM
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I would try the easiest first. Put in a new plug. Cleaning a plug is Ok but will not repair a defective one, obviously.

Mike

Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.
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post #4 of 10 (permalink) Old 10-13-2010, 12:45 PM
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What do you mean by vacuum cap?

The thing that speaks to me is the pint of coolant. That says headgasket.

My bike hasn't used a pint of coolant in 23 years.

Why ain't we ridin'?
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post #5 of 10 (permalink) Old 10-13-2010, 07:17 PM Thread Starter
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There was a cap on #1 or what was left of it. It was located on the leading edge where the manifold bolts to the head. On the rest of the carbs it seems to have a screw in them. It was a pressed in fitting and looked to be brass inside. Maybe a photo would help? Can't seem to find a good description in the manual.
I will get a new plug after work tomorrow.



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post #6 of 10 (permalink) Old 10-13-2010, 07:29 PM
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The port for sync guages perhaps? If so, it should have a 5mm screw. Perhaps someone lost one and just plugged the port with whatever they had at hand. That should not give you a problem on #3.

Perhapsthe missing ismoisture related - it's the right time of year. Try spraying WD-40 on the coils, ignition wires and plug boots. That is actually the best use for WD-40 - it is a water displacer. If moisture is the problem, WD40 will remove it right away.



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post #7 of 10 (permalink) Old 10-13-2010, 07:39 PM
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OK, now I know what you are referring to as a vacuum cap. Someone most likely had a Markland cruise control on there at one time. They used that #1 intake tube for vacuum. You will probably find other remnants of the CC on the bike too.

You should be able to get that screw and compression washer from your local dealer. They were used on hundreds of models.

I don't think that screw is your problem though.

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post #8 of 10 (permalink) Old 10-13-2010, 07:44 PM
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The cap you talk about should be a screw like the rest. Sounds to me somebody stripped it at one time and shoved a plug in it. This could cause a vacuum leak and poor running or maybe itfinally burned up and a chunk of it got stuck in a valve. It's also strange you had to put a pint of anti freeze in so could be radiator cap, overflow or head gasket. Does the exhaust smoke white or smell sweet at all. I would check these things first.

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post #9 of 10 (permalink) Old 10-14-2010, 06:52 PM
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Could be a lean conditionon the carb that is coughing. Just a thought.



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post #10 of 10 (permalink) Old 10-14-2010, 07:39 PM Thread Starter
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Thanks to all who replied particularly redwing52
I know I know, I should have tried the simple first. It was a bad plug.
After staying up late to check and recheck the wires and related things options. It was just a plug<DUH ME>
Rode for about 10 miles to nite and it ran great.
But now the use of anti freeze bothers me, so along with other things I guess its time for a set of head gasket
From my perspective I had a hard time believing missing on one plug it could run that bad.
But the other question is should I go ahead and rebuild the carbs or wait and see if it fouls out.
Attached is a photo of the port that was capped. And with the replies it is a vacuum port. Its capped for now.
Again thanks to all who replied next time something comes up I won't get quite as excited. I hope.
But on the other side I did learn quite alot about the Wing, and how things work and once again this site and its members are FANTASTIC.
Thank You
Brian
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File Type: jpg Carb.JPG (3.9 KB, 31 views)

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