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Author Topic: idle racing  (Read 1177 times)

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bdas2

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idle racing
« on: January 16, 2010, 06:44:51 PM »

What would cause the idle to race to 20 rpm's instead of the normal 10 rpm's. The bike ran fine last week now all of a sudden the idle is higher. This is on a 09 ultra.  Thanks for info.
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Fired00d

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Re: idle racing
« Reply #1 on: January 16, 2010, 06:53:17 PM »

Sound like a common throttle by wire problem, see below..

I was under the impression that the high idle problem should have been corrected for the '09 model year, but perhaps not if you have an early build.  The following gives some history of the issue:
------------------------------
TT380 – June 12, 2008 - High Idle Complaints on 2008 Touring Models High Idle Complaints on 2008 Touring Models

Due to ’08 Electronic Throttle Control calibration strategy parameters and throttle grip sensor variability some customers have experienced intermittent changes in idle RPMs. This condition is caused by a change in the zero position stored to memory in the ECM, as determined by the last four readings seen at key OFF. This cannot increase engine speed while riding but would change the idle RPM, similar to adjusting the throttle stop screw on a carbureted model.
To correct this condition we will be making several changes to the throttle grip sensor to reduce voltage variances and also update the way the calibration’s strategy looks at and records these voltages. Completion of these changes and test validation will take several months.
In the interim we have released revised calibrations in the latest version of Digital Tech to alleviate the high idle concerns for those customers experiencing the condition. The current software version (1.004.001) and details of the changes can be viewed by selecting the What’s New button on the home screen of DTII. This info is also on h-dnet under:  Service>Tools & Equipment Info>DTII>Version Updates-What’s New.

The new calibrations will leave the ECM powered up for 10 seconds after key OFF to complete housekeeping, allowing the rider more opportunity to release the throttle grip, so the throttle control can return to true zero before the ECM power is shutdown. This should eliminate rider induced zeroing issues. Additionally, the new calibrations will be less sensitive to voltage changes due to an increased dead-band in the operating strategy. Under certain conditions and riding styles some customers may notice a slightly different throttle feel, or comment on reduced engine responsiveness. This is due to the increased dead-band and will feel similar to a loose throttle cable adjustment on non-ETC vehicles. Therefore, we recommend only reflashing vehicles for customers experiencing the high idle concern and wait for the next version calibrations before updating vehicles on a wider scale.

SE Race Tuner and SE Super Tuner calibrations have not been updated at this time, and reflashing a stock cal over a Tuner cal may only temporarily alleviate the high idle, until you reflash back to a tuner cal. It is recommended anytime you replace ECM, TGS or Reflash the calibration to cycle the ignition switch 4 times, waiting 10 full seconds after keying off between cycles, to relearn zero TGS position.
------------------------------------------

Check with the dealer and see if you have the latest calibration level.  If he downloaded a SERT calibration when you did the 110 race kit, it may not have the new updated throttle settings.

Jerry


Try what is in red below to correct it..

:nervous:
Ummmmph......Maybe ya'all have discussed this before and I have not reviewed it.  My dealer made me aware this (might) happen and it did!!!   Normally,  after a (prolonged time to me) for warm-up,  my new bike idles at about 9500 rpms.

However,  yesterday it (for some reason) decided it wanted to idle at about 1300-1400 rpms......This was an aggrevation and the (remedy) as told to me by the service mgr was to stop the engine and then leave the "run" switch on and then cycle the ignition switch on/off at least 4 times.

Supposedly,  this "resets" the idle speed back to normal.........I tried it and next time out.....it seemed to be OK.


Anyone else had this problem. :-\   The service mgr indicated that sometimes the computer (ecm) gets the idle speed confused and does this....... :nixweiss: 

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Wrongway

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Re: idle racing
« Reply #2 on: January 16, 2010, 08:28:02 PM »

Saw this happen to 2 bikes at a GTG last year, we stopped at a dealer and they showed the owners this reset and it worked perfect.
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bdas2

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Re: idle racing
« Reply #3 on: January 18, 2010, 11:59:58 AM »

Thanks for the info  That fixed the problem
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Fired00d

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Re: idle racing
« Reply #4 on: January 18, 2010, 03:33:00 PM »

Thanks for the info  That fixed the problem
Good deal. :2vrolijk_21:

 :pumpkin:
Ride Safe,
Fired00d
 :fireman:
Logged
:pumpkin: 2004 Screamin’ Eagle Electra Glide :pumpkin:
Rinehart True Duals
SE Breather
SE Race Tuner
HogTunes Speakers
Zippers 575 Gear Drive Cams
Zippers Pro-Tapered Adjustable Push Rods
Zippers Oil Pressure Bypass Shim
Feuling Oil Pump
Feuling Lifters
Zumo 550 W/Flame Caps
Lyndall Z+ Brake Pads
CVOHarley Member #1234
PGR Member #754 (Since '05)
Proud Member EBCM #2.0
 

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