S2000 Under The Hood S2000 Technical and Mechanical discussions.

Car nearly stalls at idle sometimes

Thread Tools
 
Old 03-20-2012, 04:23 PM
  #1  
Registered User
Thread Starter
 
macdaddies911's Avatar
 
Join Date: Apr 2008
Location: fuuuuuuuuu
Posts: 2,149
Likes: 0
Received 1 Like on 1 Post
Default Car nearly stalls at idle sometimes

My battery died in my car recently because I had the keys in the ignition when changing my soft top. I feel like the car idles a little "rough" sometimes it dips VERY low and rumbles to almost a stall. Is this just the ECU "relearning".
Old 03-20-2012, 05:10 PM
  #2  

 
Mezza's Avatar
 
Join Date: May 2011
Posts: 695
Likes: 0
Received 0 Likes on 0 Posts
Default

I had the same issue, turned out to be a faulty knock sensor.

It would dip below idle and shudder when coming to a stop and revving the car.
Old 03-20-2012, 09:01 PM
  #3  

 
2003AP1's Avatar
 
Join Date: May 2010
Location: New York
Posts: 576
Likes: 0
Received 1 Like on 1 Post
Default

Could also be a dirty IAC
Old 03-21-2012, 04:47 AM
  #4  
Registered User
 
romelo1680's Avatar
 
Join Date: Jun 2011
Posts: 64
Likes: 0
Received 0 Likes on 0 Posts
Default

any cel
Old 03-21-2012, 06:51 AM
  #5  
Registered User
 
vert2k's Avatar
 
Join Date: Feb 2012
Location: Orlando
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by romelo1680
any cel
Whenever the battery is disconnected, you should have the car relearn idle. From the service manual: in your case disconnect battery again for a few minutes, step on brakes to reset ecu. Then make sure everything is off dome lights, radio, etc. Start engine and hold at 3000 rpm until hot enough and radiator fan kicks, then let idle for another 5 min. Then shutdown and restart normally, idle is recalibrated.

When I did this I couldn't hear the radiator fan go on, so helps if you have a second person watching for the fan to kick on. Also my EPS steering light came on, but as soon as I drove the car, the light went away. My idle is good now
Old 03-21-2012, 07:28 AM
  #6  
Registered User
Thread Starter
 
macdaddies911's Avatar
 
Join Date: Apr 2008
Location: fuuuuuuuuu
Posts: 2,149
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by vert2k
Originally Posted by romelo1680' timestamp='1332334027' post='21529532
any cel
Whenever the battery is disconnected, you should have the car relearn idle. From the service manual: in your case disconnect battery again for a few minutes, step on brakes to reset ecu. Then make sure everything is off dome lights, radio, etc. Start engine and hold at 3000 rpm until hot enough and radiator fan kicks, then let idle for another 5 min. Then shutdown and restart normally, idle is recalibrated.

When I did this I couldn't hear the radiator fan go on, so helps if you have a second person watching for the fan to kick on. Also my EPS steering light came on, but as soon as I drove the car, the light went away. My idle is good now
Interesting!
Old 03-21-2012, 08:39 AM
  #7  
Registered User

 
Jdrum1's Avatar
 
Join Date: Jan 2012
Location: West Texas
Posts: 1,040
Likes: 0
Received 2 Likes on 2 Posts
Default

Is this idle relearn process the same for other Honda's?
Old 03-23-2012, 09:22 AM
  #8  
Registered User
 
vert2k's Avatar
 
Join Date: Feb 2012
Location: Orlando
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Jdrum1
Is this idle relearn process the same for other Honda's?
I don't know but hopefully someone else will. I got the instructions specifically from S2000 service manual
Old 03-27-2012, 02:55 PM
  #9  
Registered User
 
tone.101's Avatar
 
Join Date: Feb 2012
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 2003AP1
Could also be a dirty IAC
dirty iac?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
chicomacattack
S2000 Under The Hood
7
03-11-2015 02:00 PM
s2konroids
UK & Ireland S2000 Community
5
04-29-2009 12:07 PM
REV_29K
Australia & New Zealand S2000 Owners
15
05-27-2005 03:06 AM
cmflex84
S2000 Under The Hood
2
09-12-2004 06:59 PM



Quick Reply: Car nearly stalls at idle sometimes



All times are GMT -8. The time now is 03:42 AM.