 spittting at carb
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Joined: Jan 2005
Posts: 30
Greenhorn
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OP
Greenhorn
Joined: Jan 2005
Posts: 30 |
Took my 02 America for first ride of the season.It was running good and cruising nicely then all of a sudden the right cylinder started cutting out and backfiring out the carb. It seamed to go good for a while then did it again. It goes away then comes back. I was able to make it home but am wondering where to start checking. I think I'll switch coil wires and see if problem goes to left side. Any thoughts on what else may be going on? Thanks Steve
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Re: spittting at carb
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Joined: Feb 2007
Posts: 23,133 Likes: 52
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,133 Likes: 52 |
I think it sounds like your CDI is on the way out.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: spittting at carb
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Joined: Aug 2009
Posts: 1,466 Likes: 4
Learned Hand
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Learned Hand
Joined: Aug 2009
Posts: 1,466 Likes: 4 |
'04' Black America
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Re: spittting at carb
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Joined: Sep 2015
Posts: 797 Likes: 17
3/4 Throttle
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3/4 Throttle
Joined: Sep 2015
Posts: 797 Likes: 17 |
TTP Firestarter and Blue Flame Coils ROCK.
Good excuse to upgrade them.
Just make sure the vent hose is not pinched or plugged and that the hidden fuel filter are not causing the issue.
Road Rash Heals. Freckles Grow Back. Ride
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Re: spittting at carb
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Joined: Jan 2008
Posts: 1,152 Likes: 12
Learned Hand
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Learned Hand
Joined: Jan 2008
Posts: 1,152 Likes: 12 |
I concur, the right side cutting out and then okay, then repeating. CDI going bad, if it is that it will get progressively worse.
having gone down this road with 2 OEM units and a Pro Com, the TTP firestarter is definitely the way to go.
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
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Re: spittting at carb
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Joined: Jan 2005
Posts: 30
Greenhorn
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OP
Greenhorn
Joined: Jan 2005
Posts: 30 |
So I switched the coils and the bike ran fine for the short ride I took in between rain showers. I'm gonna go for a longer ride maybe tomorrow, weather permitting,to really get the engine up to temp and the electronics to warm up and see if the opposite side starts acting up. So does the CDI act up always or act up after it gets hot from the engine?
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Re: spittting at carb
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Joined: Feb 2007
Posts: 23,133 Likes: 52
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,133 Likes: 52 |
the ones I have seen show no pattern, they act up randomly until they quit all together and don't come back. I have never seen one lose both sides though, usually one or the other.If it does not switch sides it's the CDI.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: spittting at carb
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Joined: Feb 2008
Posts: 2,668 Likes: 14
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,668 Likes: 14 |
Another possibility- if it is a bad pick up coil (a/k/a ignition sensor) the failure generally shows up after several minutes of running. When it cools down it then may run normally again until it is back to full operating temp.
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Re: spittting at carb
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Joined: Jun 2010
Posts: 1,193 Likes: 22
Learned Hand
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Learned Hand
Joined: Jun 2010
Posts: 1,193 Likes: 22 |
Generally I've seen two types Of CDI failure.
1. As above.
2. Bike is fine. Then never fires up again.
I took the Road Less Travelled.
Now where the ****** am I?
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Re: spittting at carb
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Joined: Jan 2005
Posts: 30
Greenhorn
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OP
Greenhorn
Joined: Jan 2005
Posts: 30 |
I took the bike for a longer ride today and it started acting up after about 15 minutes. Still the right side cutting in and out. So switching coils did nothing. I guess I'm gonna order a Firestarter CDI. Would I benefit from Blue Flame coils also? My bike has the Freak installed with jetting and Epco pipes. BO2S4, I'm keeping your comment in mind also, as your comment fits the situation. Thanks
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Re: spittting at carb
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Joined: Oct 2012
Posts: 459 Likes: 1
Adjunct
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Adjunct
Joined: Oct 2012
Posts: 459 Likes: 1 |
When my cdi went bad at 40,00 miles one cylinder would intermittingly stop firing, then kick back in then cut out again. There did not seem to be any pattern to it. Replaced it and never had an issue again. A bad coil would follow would over to the other cylinder when you swapped it over. A bad ignition pick up sensor generally manifests by the bike cutting out all together after it gets up to operating temperature then starting back up after it cools down, then cutting out again once it has warmed back up.
2006 865 Neon Blue/Jet Black Speedmaster,790cams, TTP Stage 2 Firestarter, Epco Exhaust with 10.25" Samson Vrod baffles, UNI pods with 40 pilots, 150 mains,Thruxton needles, 3 turns out.
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Re: spittting at carb
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Joined: Jan 2005
Posts: 30
Greenhorn
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OP
Greenhorn
Joined: Jan 2005
Posts: 30 |
Well I got my Firestarter CDI installed and the bike is running great again. Thanks for the help. Steve
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Re: spittting at carb
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Joined: Aug 2009
Posts: 1,466 Likes: 4
Learned Hand
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Learned Hand
Joined: Aug 2009
Posts: 1,466 Likes: 4 |
Glad you reported back and it's running again.  
'04' Black America
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