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Sometimes at idle it revs up

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Old Jul 15, 2015 | 06:06 AM
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Default Sometimes at idle it revs up

I have a 2012 wide Glide that turned over hard on the air breather side. After I ride it for 10 or 20 minutes and stop to an idle, it will rev up to 12 or 1300 rpms. That is when it starts running rough at idle. Most times it will go dead when I try to give it the throttle. Also, when it starts, I have to keep revving it up and it acts like it wants to go dead or goes dead. It runs great after it's been sitting a while. Do you think putting it on that machine the Harley place has would diagnose the problem or just tell me to replace everything? Thanks very much for reading all this!
 

Last edited by ozonerainey; Jul 29, 2015 at 07:02 PM. Reason: Making it shorter and to the point
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Old Jul 15, 2015 | 12:06 PM
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I'd start by replacing everything.
j/k
Start with the basic stuff- check battery cables and ground connections, coil wires, spark plug boots, etc.
Did the bike throw any codes?
You can try cleaning the IAC with some throttle body cleaner spray. This would be my prime suspect from what you describe.
These bikes can also get pinholes in the internal fuel lines. When you prime the fuel pump you can hear gas hitting the inside of the tank, especially if there's only a gallon or so in it. Sometimes you can even see it with the gas cap off.
 
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Old Jul 15, 2015 | 12:19 PM
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Tel me more about your build.... o you have a tuner like a Power Commander on it? Have yoo added something to it lately? What is not stock and how long has it been that way?
 
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Old Jul 15, 2015 | 03:20 PM
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Thanks for your suggestions. That gives me some things to try. I'll let you know if I find out what it is.
 
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Old Jul 15, 2015 | 03:23 PM
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It's a stock 103 and I bought it new.
 
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Old Jul 15, 2015 | 03:32 PM
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could indicate running out of fuel which would explain why it revs up before it dies as the mixture gets lean and also explains the difficult to start. Pinhole in fuel line, plugged fuel filter, bad fuel pump, plugged injectors.......
Do you hear the fuel pump run when you 1st cycle the ignition switch?
 
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Old Jul 15, 2015 | 03:58 PM
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Check to make sure either of these rubber vacuum caps aren't cracked/split/missing.
 
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Old Jul 16, 2015 | 03:55 AM
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Thanks Lama. I going to start early this morning.
 
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Old Jul 16, 2015 | 04:00 AM
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I don't know whether you got my reply because my computer went offline while I was sending my reply, but it stated I'd put some booster in it two times a month ago, so it might be clogged up.
 
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Old Jul 16, 2015 | 06:34 AM
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possibly IAC valve, try giving it a clean by spraying it with carby cleaner, mine acted similarly to what you are describing and that fixed mine
 
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