Engine problem.
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Road Master
Joined: Dec 2013
Posts: 1,238
Likes: 96
From: fort walton beach
Engine problem.
Today while riding everything was good until I accelerated to pass a car. When I backed off the gas bike started to break up and sputter. It stayed running and will start fine it just sputters and feels like it is running on one cylinder. I don't have a check engine light on yet but was wondering if anyone else has had this problem.
Ultimate HDF Member
Joined: Jan 2009
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From: East Tn Foot of The Dragon
Today while riding everything was good until I accelerated to pass a car. When I backed off the gas bike started to break up and sputter. It stayed running and will start fine it just sputters and feels like it is running on one cylinder. I don't have a check engine light on yet but was wondering if anyone else has had this problem.
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Road Master
Joined: Dec 2013
Posts: 1,238
Likes: 96
From: fort walton beach
This is on a 2007 night train. I pulled the plugs and they look ok. They are a little old but nothing to show they should be the issues. Spark plug wires are clean on the inside and really the way things happens all of a sudden makes me think it is more of a mechanical issue
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Road Master
Joined: Dec 2013
Posts: 1,238
Likes: 96
From: fort walton beach
I just swapped the coil with a spare one I had laying around with no change. My bike sounds like a damn honda when it is idling and real poppy when I blip the gas. I will try a new set of plug wires and spark plugs tomorrow but I don't think that is the problem. I think this problem is fuel related cause it does not smell rich like one would have with a non fire cylinder. My thoughts right now is a dead fuel injector, bad tps sensor, or bad map sensor. Tomorrow I will also do a compession test to make sure it is not a dead cyclinder.
Last edited by stal94gt; Feb 27, 2016 at 06:44 PM.
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Road Master
Joined: Dec 2013
Posts: 1,238
Likes: 96
From: fort walton beach
Sorry for the offensive words. Just trying to get to the bottom of this without spending
More than the bike is worth. To be honest my bike sounds just like my buddies honda 1300 with drag pipes. Not really a good sound to me. Also I have checked my dtc's and there are no codes popping up. Kind of leaves me with my head scratching here
More than the bike is worth. To be honest my bike sounds just like my buddies honda 1300 with drag pipes. Not really a good sound to me. Also I have checked my dtc's and there are no codes popping up. Kind of leaves me with my head scratching here
Last edited by stal94gt; Feb 27, 2016 at 08:01 PM.
Thread Starter
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Road Master
Joined: Dec 2013
Posts: 1,238
Likes: 96
From: fort walton beach
Did a few checks with little progress to the problem. I did a compression test and each cyclinder hits 175 psi + or - 2 psi which is plenty in spec with factory. I pulled the crank shaft position sensor and found no damage with nothing stuck to it. Tomorrow I will continue and work the fuel and intake side. I don't show any signs for a lean condition but I will look the injectors over when I remove the intake. I am really leaning towards a bad map sensor right now
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From: Lafayette, Louisiana
Have you changed out the handlebars or recently did something to the electrical system? How is the battery and cables?
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