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ryord
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« on: April 17, 2012, 06:24:07 AM » |
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Hello, I seem to be chasing this gremlin since I have had the bike over a year. The carbs where rebuilt, I do not think it is the petcock but will replace it with a manual or convert the oem. It is intermittent. The bike will loose one cylinder and start missing. I can pull the plug on the 5 or six cylinder and it will recover, very weird. I had a similar problem with an old Mercedes a few years ago. I found that one of the plug wires went haywire and failed when the engine got warm mostly in warm weather, an intermittent plug wire, beat that. I thought they where like being pregnant either you where or you weren't. I am in the process of finding some replacement coils and wires. Does anyone have any ideas. Can the resistors be replaced? I look forward to your reply's . Thanks Rick in Kansas City.
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #1 on: April 17, 2012, 11:47:48 AM » |
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I guess I don't quite understand.. The engine develops a mis-fire and pulling either 5 or 6 plug wire causes the mis-fire to disappear ?? That doesn't quite make sense to me.. One coils runs 2 cylinders on these monsters,, The rear coil fires 5 and 6.. Try and tell us which cylinder appears to be mis-firing.. Why buy parts before you know what is wrong ?? Why not try and make sure the electrical connections are clean and tight if you think its an electrical issue.. A lot of good electrical parts are replaced when the problem is just a bad connection/ground..
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wild6
Member
Posts: 251
(Old enough to know better)
Vernon, NJ
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« Reply #2 on: April 17, 2012, 11:57:04 AM » |
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Somebody had a 5/6 problem recently http://www.valkyrieforum.com/bbs/index.php/topic,40837.0.htmlTurned out to be a loose harness wire on the coil. |
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  “Meddle not in the affairs of the Dragon, for you are crunchy and taste good with ketchup.” |
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ryord
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« Reply #3 on: April 17, 2012, 12:14:48 PM » |
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Hello, It misses intermittently on the back two cylinders I think 5 and 6, when I pull the plug wire not completely off but just enough to hear check for the sound of the spark the bike recovers and runs fine. It seems to me I can pull the left rear plug off just letting it rest on the plug but not fully connected and the problem goes away, I know it is strange. Just had the bike apart for a complete carb rebuild and checked all grounds to coils when reinstalled. I did not check the connections yet from the ECM module. but I am making the assumption that it is not the computer. Thanks
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art
Member
Posts: 2737
Grants Pass,Or
Grants Pass,Or
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« Reply #4 on: April 17, 2012, 02:25:07 PM » |
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I had just about the same problem a few yrs. ago changed the wires an bought a new coil,switched coil around an still could not fix it.It turned out to be carbs.You can get plug wires at any automotive parts house and work the boots off the stock ones.I did that with accel plug wires .
i ended up buying carbs from a member an haven't had any trouble since.
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ryord
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« Reply #5 on: April 17, 2012, 03:02:52 PM » |
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Do you uys think that this could still be Carb related even after complete Carb overhaul?
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ryord
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« Reply #6 on: April 17, 2012, 04:26:50 PM » |
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When it cuts out it feels electrical, very quick, does not feel like a carb to me.
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salty1
Member
Posts: 2359
"Flyka"
Spokane, WA or Tucson, AZ
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« Reply #7 on: April 17, 2012, 05:53:24 PM » |
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When we're the plugs changed last?  |
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My rides: 1998 GL1500C, 2000 GL 1500CF,2006 GL 1800 3A   |
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longrider
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« Reply #8 on: April 17, 2012, 06:30:42 PM » |
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When you pull the plug wires off a bit it increases the resistance. Replace your plugs and you should be good to go. I've had the same thing happen.
warren
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big bear craig
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« Reply #9 on: April 17, 2012, 06:38:58 PM » |
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I'm the one who had the problem with the 5&6 cylinders. Mine turned out to be a loose wire on top of the rear coil. Pulling the carbs, it would be very easy to knock a wire loose somewhere. Make sure you double check everything. Start simple and go from there.
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ryord
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« Reply #10 on: April 17, 2012, 07:17:48 PM » |
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:laugh:the plugs where replaced just 2 weeks ago I will replace the 5 and 6
plugs again I was thinking that maybe a wire had gone bad . Thanks for all of the help
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Ricky-D
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« Reply #11 on: April 18, 2012, 07:18:00 AM » |
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It's a simple and easy thing to check the wires for continuity, resistance and connectivity.
Just throwing parts at a problem is a poor choice.
It takes intelligent thought and good technique when problem solving.
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2000_Valkyrie_Interstate
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #12 on: April 18, 2012, 01:33:28 PM » |
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It seems as if you have secondary voltage going to ground somewhere when you completely connect either 5 or 6 plug wire.. That could be a bad plug wire connector or a defective plug[cracked insulator,etc].. If you can't see anything wrong why not just swap 5/6 sparklers with 3/4 and see if the mis-fire follows the sparklers..
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Madmike
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« Reply #13 on: April 18, 2012, 06:28:06 PM » |
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use existing parts to determine the problem, you got 6 plugsand wires and 3 coils you can move around
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