#1 cylinder does not working


Information and questions on GL1100 Goldwings (1980-1983)
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laimonas
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Motorcycle: 1980 GL1100 interstate

#1 cylinder does not working

Postby laimonas » Tue May 14, 2013 2:01 pm



hello.#1 cylinder does not working.when engine warm,#1 starts shootinh from exhaust.to do work:changed spark plugs,plug wires,cleaned carb,adjusted valves,even head gaskets was changed.gas and spark is,but #1 just shooting.no longer know what to do?pleas help.and sorry for my english.i hope you understud what i want. :?



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virgilmobile
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Re: #1 cylinder does not working

Postby virgilmobile » Tue May 14, 2013 2:21 pm

For clarity to understand.....
#1 cylinder does not fire.
when warm... popping/shooting noise in the exhaust...

You have OK spark on #1 cylinder...
Carburators cleaned...

Look at these things.....

Remove #1 spark plug...Is it wet with fuel.? Smell like fuel.?
Test the compression....Is it close to the pressure in the other cylinder?

laimonas
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Re: #1 cylinder does not working

Postby laimonas » Tue May 14, 2013 2:28 pm

yes i forgot compression o.k. two 10bar,two 11bar.






laimonas
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Re: #1 cylinder does not working

Postby laimonas » Tue May 14, 2013 2:32 pm

virgilmobile wrote:For clarity to understand.....
#1 cylinder does not fire.
when warm... popping/shooting noise in the exhaust...YES

You have OK spark on #1 cylinder...*/YES
Carburators cleaned...YES

Look at these things.....

Remove #1 spark plug...Is it wet with fuel.? Smell like fuel.?SPARK PLUG DRY,BUT I SEE GAS ON VALVE,IF TAKE OFF CARB PIPE.
Test the compression....Is it close to the pressure in the other cylinder?

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virgilmobile
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Re: #1 cylinder does not working

Postby virgilmobile » Tue May 14, 2013 2:52 pm

3 things make a cylinder fire
Spark...Ok
Compression...OK

Fuel...
You must not be getting enough fuel.
Possible problem..
The rubber "O" ring is broken.The cylinder is sucking air.
Throttle valve closed..remove both intake tubes and look into the carburator at them operate.
They MUST open and close exactly the same.
Open the throttle and operate the slide.They must not be stuck closed.
The slide must move very free up and down.
If all is OK the carburator is fouled or plugged and no fuel is getting out.

laimonas
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Re: #1 cylinder does not working

Postby laimonas » Tue May 14, 2013 3:00 pm

Remove #1 spark plug...Is it wet with fuel.? Smell like fuel.?SPARK PLUG DRY,BUT I SEE GAS ON VALVE,IF TAKE OFF CARB PIPE.

Calzone
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Re: #1 cylinder does not working

Postby Calzone » Tue May 14, 2013 4:38 pm

I would probably try to solve the fuel/no fuel issue by pulling the screw plug on the #1 manifold and crew a carb sycronizer fitting in it, then hook up a tube. Pinch the tube , start up the bike and inject a little gas in the tube...release the pinched tube and let the motor suck the fuel in and see if it is better or worse.
Other ways to rig up something but it will tell you is it is fuel starvation or spark.

dwight007fchr
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Re: #1 cylinder does not working

Postby dwight007fchr » Tue May 14, 2013 9:49 pm

Could this be an intake or exhaust valve way out of adjustment?

With the exhaust pipes off like he showed in the second video, is it normal to see the combustion as seen in the left side, or is the right cylinder typical of a normal combustion?

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virgilmobile
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Re: #1 cylinder does not working

Postby virgilmobile » Tue May 14, 2013 9:59 pm

Not likley.he indicates the compression is normal.

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virgilmobile
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Re: #1 cylinder does not working

Postby virgilmobile » Wed May 15, 2013 11:01 am

Equal compression indicates the valves are really close...Even at one tooth off,the front cylinder would still fire...just not very well.
The rear cylinder is getting too much fuel,thus the popping in the exhaust....
The wet intake valve indicates some fuel is getting close to the combustion camber,but the dry plug indicates it's not getting in....
Good compression indicates the cylinder is gulping air so the only thing left is a large vacuum loss between the carb and valve or fuel starvation.
That cylinder just isn't getting the right fuel mixture into it to burn.

laimonas
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Re: #1 cylinder does not working

Postby laimonas » Wed May 15, 2013 1:26 pm

hello.i cheked one more time.spark plug is wet.sorry.

laimonas
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Re: #1 cylinder does not working

Postby laimonas » Wed May 15, 2013 1:34 pm

if you watch second video,you must see dust(gas and air)from cylider#1exhaust,but its not burn.

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virgilmobile
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Re: #1 cylinder does not working

Postby virgilmobile » Wed May 15, 2013 3:29 pm

Spark plug is wet.
cylinder not firing/burning gas.
spark OK.

These are the only things I can think of why just one cylinder does not fire and has a wet spark plug.

#1...The spark plug may be spoiled....exchange it with one that is working....

#2...Valve timing....Timing belts....check the timing mark on the camshaft sprocket with the flywheel at #1 TDC.
It must be accurate...two teeth off can cause this problem and not damage the engine.

#3...Valve adjustment....must be made "BY THE BOOK" adjust the valve clearance only when the engine has been rotated to the proper timing mark...#1 TDC and cold.

#4...One carburator flooding with fuel....too much gas going into the cylinder...The float may be stuck or put on backward...Yes it can be done by mistake...I did that on my bike...

Please let us know what you find....

laimonas
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Re: #1 cylinder does not working

Postby laimonas » Fri May 17, 2013 11:21 pm

I take of carb and see gas on intake valves #1,#2,#4.
i checked, carb floats stoping gas.
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dwight007fchr
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Re: #1 cylinder does not working

Postby dwight007fchr » Sat May 18, 2013 6:24 am

Man, you have me baffled here with this mechanical mystery. Now I am thinking that the float is stuck in the carb, and that cylinder is getting swampped with gas, so much that the plug cant fire. Maybe the "dust" coming out is concentrated gas. Im surprised that it doesnt ignite by the other cylinder that is throwing out some flame.

Did you ever try another plug in that cylinder to make sure there is spark there? Just lay the plug against the side of the intake manifold and crank her over and look for a spark. Also, you actually screwed in a compression gauge on that cylinder and cranked the engine a few seconds and got a good reading on the scale?

Let us know what the problem was......that Wing sounded like an old 1920s John Deere threshing machine grinding wheat.

dwight




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