Question about 2008 Harley Davidson FLTR Road Glide

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Fluctuating cold idle - 2008 Road Glide

On cold start engine starts up and goes to 1,500 rpm's then quickly drops to 1,000 rpm's, then finally goes back up and levels off at 1,500 rpm's.

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  • Contributor
  • 24 Answers

Try this:
Turn kill switch to ON/RUN position.Cycle the ignition(key) switch 4 times (each time long enough for engine light to go out ~15 seconds).
This resets the "zero" position of the Throttle for the ECM.

Posted on Jun 18, 2014

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Mitchy123
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SOURCE: Check engine light comes on for about 10 secs. after starting

Its a self diagnostic,,,, the check engine light should stay on for a few seconds and then go out ....as long as it doesnt come back on ....u are A OK !

Posted on Apr 18, 2009

stephensaon_
  • 284 Answers

SOURCE: 2004 electra glide classic- cut out going down the

Call your local dealer and have them run your vin( Vehicle Identification Number ) through HD Net to see if you have any outstanding recalls. There was a recall on the circuit breaker and the ignition switch around that time of production. better to be safe than sorry.

Posted on Jun 27, 2009

  • 50 Answers

SOURCE: 2002 Dyna wide glide. Will not IDLE

not running for a year! You have a varnish buildup in the low end circuit of the carb. You will need to remove the carb and do a full teardown of the carb to properly rectify this problem. SOMETIMES we are able to free up the passages by putting SEA FOAM cleaner in the tank , fill her up with fresh fuel and ride through the tank and it will clear up. SEA FOAM can be purchased at an auto parts store and is sometimes very effective. 1/4 cup to full tank fuel.

Posted on Jul 14, 2009

  • 5 Answers

SOURCE: Idling high

Your sucking in air on the induction circuit somewhere. Probably a split in a pipe around the carbs. This leans out te mixture and raises the revs.

Posted on Jul 25, 2009

  • 13 Answers

SOURCE: My check engine light goes on sometimes and then

on your dash is the button to check your milage. push it in and hold it down until your codes come up. some of the numbers it will go through will only be ecm numbers

Posted on Oct 09, 2009

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1 Answer

Idle fluctuates on cold start - 2008 Harley Road Glide


sounds like you have a vacuum leak. that is where i would start. other then that i would start checking sensors.

May 17, 2014 | 2008 Harley Davidson FLTR Road Glide

1 Answer

Idle fluctuates on cold start - 2008 Harley Road Glide


This is H-D tech bulletin on 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 gripsensor
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 screwon a
carbureted model.
To correct this condition we will be making several changes to the throttle gripsensor 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 Techto
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 poweris 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 cableadjustment 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 Tunerand SE Super Tunercalibrations 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 Ign.
switch 4times, waiting 10 full seconds after keying off between cycles, to relearn zero TGS
position.
The following warranty credit procedures will apply to domestic dealers only:
Warranty credit will be allowed for reflashing the calibration at the usual rate.
For OE calibrations including CVO, file an MC claim using labor code 7804 for 0.2 hours
labor.
For SWR'ed P&A calibrations, file a PNA claim using labor code 8209 for 0.2 hours labor.
Non-registered P&A performance calibrations will require preauthorization for warranty credit.
NOTE: Labor code 8209 is a new code and may need to be downloaded into your system

May 17, 2014 | 2008 Harley Davidson FLTR Road Glide

1 Answer

I have a 2008 mercury Milan with nearly 60k miles on it. When I come to a stop the rpm drops by 1000 then recovers quickly. What should I do to fix the problem? Any suggestions will be greatly appreciated.


Check out related help links to troubleshoot these problem:----Click the link below:---Idles Fine but RPM jumps in drive mode? http://technoanswers.blogspot.in/2012/07/idles-fine-but-rpm-jumps-in-drive-mode.html
---------Mitsubishi Lancer rpm needle bounces? http://technoanswers.blogspot.in/2012/02/mitsubishi-lancer-rpm-needle-bounces.html
--------How to adjust rpm on 2009 dodge charger SRT8?


http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
---------
Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

---------

Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

---------
High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-----------
Jetski Sputters and Low RPM? http://whatisbyme.blogspot.in/2012/07/jetski-sputters-and-low-rpm.html

--------
Fuel Injection Problem And RPM suddenly increases http://whatisbyme.blogspot.in/2012/07/fuel-injection-problem-and-rpm-suddenly.html

----------
2005 Toyota Highlander: Engine runs hard RPM below 3000? http://whatisbyme.blogspot.in/2012/05/2005-toyota-highlander-engine-runs-hard.html

---------
1987 Toyota Camry: RPM Drops going Up hills? http://whatisbyme.blogspot.in/2012/05/1987-toyota-camry-rpm-drops-going-up.html

-----------
Cruise Control stops working, Excessive cranks to start the engine and RPM goes max 2500 http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html

----------
1990 Toyota 4Runner: Engine cuts off when reaches 2000 RPM?


http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html

------------
1999 Toyota Camry: Erratic stalling and high engine RPM at idle?


http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html

---------
1995 Toyota LS: Misfire at idle or low RPM http://whatisbyme.blogspot.in/2012/04/1995-toyota-ls-misfire-at-idle-or-low.html

-----------
Lexus RX: Tapping noise under Valve Cover At Low RPM? http://technoanswers.blogspot.in/2012/04/lexus-rx-tapping-noise-under-valve.html

----------
These will help.
Thanks.

Nov 22, 2012 | Cars & Trucks

1 Answer

Driving on the road the RPM goes higher wituout speedind


Check out related help links to troubleshoot these problem:----Click the link below:---Idles Fine but RPM jumps in drive mode?http://technoanswers.blogspot.in/2012/07/idles-fine-but-rpm-jumps-in-drive-mode.html
---------Mitsubishi Lancer rpm needle bounces?http://technoanswers.blogspot.in/2012/02/mitsubishi-lancer-rpm-needle-bounces.html
--------How to adjust rpm on 2009 dodge charger SRT8?


http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
---------
Engine cuts out at 3000 RPM?http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

---------

Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

---------
High rpm in neutral? Inconsistant high RPM in neutral?http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

-----------
Jetski Sputters and Low RPM? http://whatisbyme.blogspot.in/2012/07/jetski-sputters-and-low-rpm.html

--------
Fuel Injection Problem And RPM suddenly increaseshttp://whatisbyme.blogspot.in/2012/07/fuel-injection-problem-and-rpm-suddenly.html

----------
2005 Toyota Highlander: Engine runs hard RPM below 3000?http://whatisbyme.blogspot.in/2012/05/2005-toyota-highlander-engine-runs-hard.html

---------
1987 Toyota Camry: RPM Drops going Up hills?http://whatisbyme.blogspot.in/2012/05/1987-toyota-camry-rpm-drops-going-up.html

-----------
Cruise Control stops working, Excessive cranks to start the engine and RPM goes max 2500 http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html

----------
1990 Toyota 4Runner: Engine cuts off when reaches 2000 RPM?


http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html

------------
1999 Toyota Camry: Erratic stalling and high engine RPM at idle?


http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html

---------
1995 Toyota LS: Misfire at idle or low RPMhttp://whatisbyme.blogspot.in/2012/04/1995-toyota-ls-misfire-at-idle-or-low.html

-----------
Lexus RX: Tapping noise under Valve Cover At Low RPM?http://technoanswers.blogspot.in/2012/04/lexus-rx-tapping-noise-under-valve.html

----------
These will help.
Thanks.

Nov 22, 2012 | 2008 Toyota Avalon

1 Answer

The rpm go up an down


Change your coolant temperature sensor for the computer.(not the one for the temperature gauge).They are located one beside the other,under the distributor cap.The parts supplier will know which one you need.When you start the car cold it usually idles 1800 to 2000 rpm for a minute or so and as the resistance starts to decrease,the rpm drops.after a couple minutes the rpm goes to 1000 rpm.People that are in the habit of driving the car right away at 2000 rpm are putting a huge stress on the axles,and find that they are replacing them every 100000 km.It also wears out your brakes faster .When the sensor goes bad,it causes a fluctuating idle .

Dec 30, 2010 | 1998 Honda Accord

1 Answer

I have a 2008 ultra classic all of a suden when you start it idle is high 20 thosand rpm any thing i can try befor . thaking it to the dealer. thanks rick e.


20 thousand rpm? I don't think so. Obviously you're reading the tachometer wrong. It may be idling at 2000 rpm. I agree that this cold start fast idle is a bit high for me as well. You have no choice but to take it to a dealer or an independent dealer that can change the setting in the fuel control computer for the cold start fast idle speed. There is nothing that is "user controllable" on the late model's fuel control system. Sorry.

Good Luck
Steve

May 27, 2010 | 2008 Harley Davidson FLHX Street Glide

1 Answer

2004 GMC Sierra Heater does not heat on low RPM


check your coolant level on the radiator

Feb 03, 2009 | 2000 GMC New Sierra 1500

1 Answer

1990 Honda Prelude 2.0 si F.I. Idle Fluctuation


This problem is a little bit hard to coz you need to check the following throttle body, fast idle valve & the IACV valve. First the throttle body it must fully closed during idle and the TP sensor voltage must be 0.5 volt. The fast idle valve is wax type there is a 2 small hose pass below of this valve, if the coolant water is not circulating the valve will not closed. You can check it by touching the lower portion of this valve after 1 min. Regarding the IACV you can check if this is the fault by removing the hose connecting the throttle body and air filter. there is 2 small hole near the opening of the throttle body, while the engine is running at idle close one by one and see which one cause this problem.I hope this will give help to your problem.

Sep 23, 2008 | 1990 Honda Prelude

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