Question on, missing in 1100 until 5000rpm then smooths out.

[Shayne]

Howdy folks, I just got back from a 2 hr ride to see how it would run after it went to the shop. I coughed out $1340.00 for carb kit, plugs, all fluids, filters and greases. 12 hours labor. Anyway I live about an hour away and found these issues. The mechanic told me it was not running on #3 cyl. I asked if he had done a compression test and he said he didn't think it was an issue. He thought it was in the carb and plugs. When I picked it up it started/ran okay.
It seemed to run well in the city with stop and go driving.
When I was on the hwy I decided to see if the acceleration was as it should be. I cranked the throttle and it was like sort-of missing, but when it 5,000 rpm it cleared and ran smooth until around 7 grand then started missing again I backed off, got to a place in traffic where I could do it again, and the same thing happened. I decided to play with the sudden rpm surge, if I didn't crank on the throttle and slowly gave gas is seemed to be okay. I also noticed it was "drinking gas" and the tailpipe has a heavy gas smell, plus it is wet.

Any Ideas would be helpful.

I called my mechanic and will be bringing it in to him on Tuesday. He thinks a part he put in might have been bad, not seated, something like that.

TIA

 

[dan filipi]

It sounds like it's running overly rich.
That can be caused mostly from float heights set too high or one or more float valves not closing completely allowing it to flood that cylinder.
There could also be issues with the carb sliders not moving freely.

All this can be exacerbated by a weak spark.
Sometimes cutting each one of the wires off a 1/4" will help since the ends where they make contact at the pin in there can get corroded. Same can happen on the coil end of the wires.

I'm really looking forward to how many weak performance problems like this can be improved just by installing the C5 ignition.
Of course the carb issues would still need to be fixed.

 

[Shayne]

dan filipi » Fri Jul 12, 2013 4:32 pm[/url]":1l1wr1m2]It sounds like it's running overly rich.
That can be caused mostly from float heights set too high or one or more float valves not closing completely allowing it to flood that cylinder.
There could also be issues with the carb sliders not moving freely.

All this can be exacerbated by a weak spark.
Sometimes cutting each one of the wires off a 1/4" will help since the ends where they make contact at the pin in there can get corroded. Same can happen on the coil end of the wires.

I'm really looking forward to how many weak performance problems like this can be improved just by installing the C5 ignition.
Of course the carb issues would still need to be fixed.

I'm not sure what or how to go about looking into a C5 ignition? Is it in the gallary?

 

[dan filipi]

Shayne » Fri Jul 12, 2013 4:42 pm[/url]":1hf9ew1o]

dan filipi » Fri Jul 12, 2013 4:32 pm[/url]":1hf9ew1o]It sounds like it's running overly rich.
That can be caused mostly from float heights set too high or one or more float valves not closing completely allowing it to flood that cylinder.
There could also be issues with the carb sliders not moving freely.

All this can be exacerbated by a weak spark.
Sometimes cutting each one of the wires off a 1/4" will help since the ends where they make contact at the pin in there can get corroded. Same can happen on the coil end of the wires.

I'm really looking forward to how many weak performance problems like this can be improved just by installing the C5 ignition.
Of course the carb issues would still need to be fixed.

I'm not sure what or how to go about looking into a C5 ignition? Is it in the gallary?

A new member here, c5performance is selling them.
I should have one in a few days for my 1100. Joedrum should have one in a couple days also for a 1000.

It's a very intriguing ignition.
Can check it out more at https://www.c5ignitions.com/ or send c5performance a PM.
We also have an installation manual for the 1000 kit in the Gallery. gallery/album.php?album_id=1997

 

[dan filipi]

P.s. No compensation to me or the forum or any of its members from sales of this ignition.
It is simply a cutting edge state of the art ignition I feel passionate about as a viable alternative to the unavailable ignition for the Gl1100 and a superior upgrade for the Gl1000 and Gl1200.

 

[slabghost]

First things first get it running right. Check all that's been mentioned. Get the carbs adjusted right. Try powering the coils through a relay operated by the present coil feed wire. Fresh wire from battery side of the solenoid through the relay to the coils will give them full voltage again as they had new.

 

[joedrum]

yes plus one

 

[C5Performance]

A few questions:

If the fuel level was too high (causing rich running), or the needle/seat is leaking on one or more carbs, why would it clean out at 5k and then start to stumble again at 7k?

My first thought is ignition just because of what was described. I might be way off but at 5,000 you totally on the mainjet and if it "cleans out" then it should remain that way all the way to redline.

One issue i might not be taking into consideration is that at very high rpm perhaps even a properly functioning ignition might run out of steam and can no longer burn off the excess fuel.

This would be were the C5 multi spark could reduce or eliminate the problem....BUT if the carbs caused this issue, they need to be fixed first.

Your mechanic can do a simple needle/seat pressure test and should know quickly if the needles are leaking.
I've never adjusted floats on a Wing but checking fuel levels werent that difficult as i remember.

 

[ekvh]

No mechanic I am... My money is on floats to high or leaky.

 

[mcgovern61]

My '81 carbs did exactly the same thing. That cylinder not firing....flooded. The floats were not set correctly which also explains the excess gas use and "gas smell" in the exhaust.

Also, that hesitation and then sudden burst, I would venture to say that when the carbs were off, the o-rings on the carb intakes were not replaced and they are now leaking vacuum....especially when you accelerate.

 

[Shayne]

dan filipi » Fri Jul 12, 2013 5:19 pm[/url]":1fyrv9ue]

Shayne » Fri Jul 12, 2013 4:42 pm[/url]":1fyrv9ue]

dan filipi » Fri Jul 12, 2013 4:32 pm[/url]":1fyrv9ue]It sounds like it's running overly rich.
That can be caused mostly from float heights set too high or one or more float valves not closing completely allowing it to flood that cylinder.
There could also be issues with the carb sliders not moving freely.

All this can be exacerbated by a weak spark.
Sometimes cutting each one of the wires off a 1/4" will help since the ends where they make contact at the pin in there can get corroded. Same can happen on the coil end of the wires.

I'm really looking forward to how many weak performance problems like this can be improved just by installing the C5 ignition.
Of course the carb issues would still need to be fixed.

I'm not sure what or how to go about looking into a C5 ignition? Is it in the gallary?

A new member here, c5performance is selling them.


I should have one in a few days for my 1100. Joedrum should have one in a couple days also for a 1000.

It's a very intriguing ignition.
Can check it out more at https://www.c5ignitions.com/ or send c5performance a PM.
We also have an installation manual for the 1000 kit in the Gallery. https://www.classicgoldwings.com/forum/g ... um_id=1997

WOW, Thanks.. Let us know how it works for you.. I'm going to wait until the mechanic does his magic, then take a good long look at it... :thanks:

 

[Shayne]

You folks are the Best!!! :good: I'm going to mention to him all that was talked about here. I'll let ya'll know what the outcome is. Hopefully it won't take to long for him to come up with the fix!

:thanks:

 

[Shayne]

arty: Well folks, I just wanted to say my Wing is in Great health! My machanic found a problem with a part he put in, replaced and made damn sure that was all that was wrong. It was. Now folks I am off for a good long ride!!!! Thanks for all your suggestions and help! :thanks:

Shayne

 

[dan filipi]

What was the part?

 

[Shayne]

dan filipi » Wed Jul 17, 2013 7:20 am[/url]":v5zp6yv4]What was the part?

It was a carb needle valve and the float was also sticking. She now runs like a Wing should!

 

[dan filipi]

Shayne » Wed Jul 17, 2013 7:24 am[/url]":2e7id74v]

dan filipi » Wed Jul 17, 2013 7:20 am[/url]":2e7id74v]What was the part?

It was a carb needle valve and the float was also sticking. She now runs like a Wing should!

So I imagine it was flooding?

 

[joedrum]

great

 

[Shayne]

dan filipi » Wed Jul 17, 2013 7:32 am[/url]":1hh6qgl3]

Shayne » Wed Jul 17, 2013 7:24 am[/url]":1hh6qgl3]

dan filipi » Wed Jul 17, 2013 7:20 am[/url]":1hh6qgl3]What was the part?

It was a carb needle valve and the float was also sticking. She now runs like a Wing should!

So I imagine it was flooding?

Yep, you were Right On with your diagnoses. It's Really hard to find here; a Good Independent GoldWing mechanic, but I must say this man in No way tried to dodge any responsibility for the issue or divert to something some other problem. No charge of course, and his way of dealing with the problem also give me a sense of him as a Mechanic and a Man. A Good one in my humble opinion.
Now to look seriously into the C5 unit. I do need a front tire first tho.

 

[C5Performance]

I am glad you followed the right path and began with the parts that were just worked on. Enjoy your well deserved ride, and be safe!

 

[AApple]

:clapping: :Egyptian: :moped: