General Harley Davidson Chat Forum to discuss general Harley Davidson issues, topics, and experiences.
Sponsored by:
Sponsored by:

Low idle on startup and when coming to a stop?

Thread Tools
 
Search this Thread
 
  #1  
Old 03-11-2011, 06:09 PM
DR. V-TWIN's Avatar
DR. V-TWIN
DR. V-TWIN is offline
Former Sponsor
Thread Starter
Join Date: Jan 2009
Location: Los Angeles, CA
Posts: 19,364
Likes: 0
Received 39 Likes on 38 Posts
Default Low idle on startup and when coming to a stop?

I can't figure this out. It all started when I changed my throttle or at least that is when I noticed it cable which leads me to believe it is something I did then. I changed the crank postion sensor today to no avail. Took the power commander off to no avail. Cleaned out the air filter to no avail.

Does the vehicle speed sensor need the speedo to work properly? I have been running without a speedo for a few weeks as i am waiting for it to come back from being modded and before I buy anything else or tear anything else part I need to know? Opinions?

thanks!

Drew
 
  #2  
Old 03-11-2011, 06:13 PM
DR. V-TWIN's Avatar
DR. V-TWIN
DR. V-TWIN is offline
Former Sponsor
Thread Starter
Join Date: Jan 2009
Location: Los Angeles, CA
Posts: 19,364
Likes: 0
Received 39 Likes on 38 Posts
Default

I was just told to try disconnecting and reconnecting my battery. I am going to do this next.

Drew
 
  #3  
Old 03-11-2011, 06:14 PM
redmonster13's Avatar
redmonster13
redmonster13 is offline
Road Captain
Join Date: Sep 2010
Location: Sherman, TX
Posts: 559
Likes: 0
Received 0 Likes on 0 Posts
Default

Its possible that the speedo is in a sensor loop and not having it would cause the ECM to use a default value. I dont know that for sure, but it is a possibility.
 
  #4  
Old 03-11-2011, 06:53 PM
KBFXDLI's Avatar
KBFXDLI
KBFXDLI is offline
Big Kahuna HDF Member
Join Date: Feb 2006
Location: USA
Posts: 23,881
Likes: 0
Received 32 Likes on 29 Posts
Default

ECM probably needs the signal from the speedo. Like redmonster said it is defaulting back to the idle table on the map. Just my guess. It may need the speedo sensor input to get the engine temp sensor to make it follow the idle temperature steps. OR maybe your engine temp sensor is faulty.
 

Last edited by KBFXDLI; 03-11-2011 at 06:56 PM.
  #5  
Old 03-11-2011, 07:06 PM
DR. V-TWIN's Avatar
DR. V-TWIN
DR. V-TWIN is offline
Former Sponsor
Thread Starter
Join Date: Jan 2009
Location: Los Angeles, CA
Posts: 19,364
Likes: 0
Received 39 Likes on 38 Posts
Default

Well, I'll find out when i get my speedo back. fI can still ride it, it's just that I have to rev it when I come to a stop to keep it going. This logic does sound sound.

Drew
 
  #6  
Old 03-11-2011, 07:10 PM
IzzoQuazzo's Avatar
IzzoQuazzo
IzzoQuazzo is offline
Retired Admin

Join Date: Jul 2006
Location: Wisconsin
Posts: 21,866
Received 9,041 Likes on 3,711 Posts
Default

I'm locking this thread because there is an identical thread in the Softail Forum. From the HD Forums Rules:

4. Double posting is not allowed and can result in the deletion of one or both posts. Double posting is defined as posting the same information in two or more separate forums. We understand that some topics might fit into more than one forum. Please try to pick the best one. In addition, please do not post in the same thread back to back (another version of double posting), if you have something more to add, edit your post, don't post twice in a row in a thread.

Izzo
HD Forums Moderator
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
joker joe
Electrical/Lighting/Alarm
8
07-25-2014 12:04 PM
07wideglider
Dyna Glide Models
5
08-13-2013 07:59 PM
reddvette
General Topics/Tech Tips
1
06-01-2010 05:58 AM
hammon
Touring Models
1
06-09-2008 06:44 PM
BFMC
General Topics/Tech Tips
1
08-26-2005 01:51 PM



Quick Reply: Low idle on startup and when coming to a stop?



All times are GMT -5. The time now is 05:19 PM.