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103 --erratic idle, surges up & down

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  #1  
Old 09-07-2011 | 06:23 PM
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Default 103 --erratic idle, surges up & down

I am not certain if this is the best section/forum to ask this or look for input...
I have a 2010 Ultra Limited. Vance & Hines headpipe and mufflers. Screamin Eagle intake. Andrews Cams. HD "Pro" Tuner.
The bike runs fine after I accelerate and take off...The problem is it idles real funny. It starts up fine/normal. It surges up and down between around 950 RPM's to 1200 RPM's on the tach...constantly up and down. It never stalls out or really misfires, it just wont idle smooth and constant.
The Bike was tuned and put on the dyno at the dealer after the cams were put in at 2000 miles.
It just turned 5000 miles on the odometer and this erractic idling has becomed more pronounced just recently.
Any ideas or suggestions on what to have checked out or anything specific to look for that would correct this problem?
Any input or feedback is appreciated.
Thanks.
 
  #2  
Old 09-07-2011 | 06:56 PM
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I'd take it back to them, they did the work and know what was done as far as tuning.

mike
 
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Old 09-07-2011 | 07:48 PM
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Are you getting a check engine light (diagnostic trouble codes)?
 
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Old 09-07-2011 | 07:56 PM
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My bike did that,, would idle from 1000 to 2000 would backfire and stall. Ok now. Had it retuned by someone else.
 

Last edited by moonie48; 09-07-2011 at 08:02 PM.
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Old 09-07-2011 | 08:08 PM
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Could it be the intake air temp sensor acting up? Maybe clean the connection and put a little dielectric grease on it.
 
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Old 09-07-2011 | 08:16 PM
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No check engine light. No stalling or misfiring...just an annoying up and down idle.
Hate to take it back to the dealer. They keep it for a week and tell me nothing is wrong with it.
I wll try cleaning the K&N air filter and maybe put new spark plugs in...Then maybe get a different tuner...never been a big fan of the Screamin Eagle tuner.
 
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Old 09-07-2011 | 08:19 PM
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Originally Posted by 1931jamesw
Could it be the intake air temp sensor acting up? Maybe clean the connection and put a little dielectric grease on it.
I will definately check that out. Thanks for the suggestion.
 
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Old 09-07-2011 | 08:21 PM
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Spray a little carb cleaner around intake at the heads while its idleing to check for manifold leak.
 
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Old 09-07-2011 | 08:28 PM
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Also clean and dielectric grease the throttle position sensor. Bodean makes a good suggestion as well.
 
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Old 09-07-2011 | 08:35 PM
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Originally Posted by Bodean46
Spray a little carb cleaner around intake at the heads while its idleing to check for manifold leak.
Another great suggestion. Thanks.
Why did'nt I think of that?? It does make good sense that its airflow/intake related.
Probably some gasket is shot/no good anymore.
As soon as it stops pouring rain and blowing like mad around her I'll get out and check these things.

Clean, inspect and grease up all these checkpoints around the intake - throttle body...with a little luck its something simple that i tend to overlook when i have one of these goddamn "senior moments"
 

Last edited by Daddio; 09-07-2011 at 08:44 PM.


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