Page 5 of 5 FirstFirst ... 345
Results 41 to 49 of 49

Thread: Surging idle when coasting

  1. #41
    Senior Member
    Join Date
    Jun 2009
    Posts
    195

    Default

    The tune named "- 2002_Camaro_COS_383_0035 test" is the one where i added 2g/s of and set the base idle to 26 degrees.

    the tune named "- 2002_Camaro_COS_383_0034" is the tune before those changes were made.
    Attached Files Attached Files

  2. #42
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    735

    Default

    Try this tune file. Do a RAFPN and post the log.
    Attached Files Attached Files

  3. #43
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Subscribing...

  4. #44
    Senior Member
    Join Date
    Jun 2009
    Posts
    195

    Default

    Well I finally got the car back out and took it for a spin today. This tune file does seem to have helped with the surging when coasting to a stop. However, now it wants to die when coming to a stop. I have to hold open the throttle slightly when coming to a stop to prevent the engine from stalling. Thus I'm assuming I need to command more idle air flow.

    attached is a log file.
    Attached Files Attached Files

  5. #45
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    735

    Default

    Did you do a RAFPN before you made this log or is the log made from the exact file I gave you?

  6. #46
    Senior Member
    Join Date
    Jun 2009
    Posts
    195

    Default

    that is the exact file I received. I have performed a RAFPN and RAFIG. For the in gear one I simply put it in drive and held the brake, odd thing is it shows needing less air then in park/neutral? is this normal? or should I take the P/N one and add slightly to get the values for in gear?

  7. #47
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    735

    Default

    Does the engine still want to die after doing the RAFIG?

  8. #48
    Senior Member
    Join Date
    Jun 2009
    Posts
    195

    Default

    Yep, pretty much if it is in gear and you are going slow, if you let off the throttle it will die. Or almost anytime you come coasting to a stop, it will die once you stop. I'd guess as soon as it enters "idle" mode is when the engine will dies. attached is a log and the tune file with the desired airflow after doing RAFIG and RAFPN.
    Attached Files Attached Files

  9. #49
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    735

    Default

    Okay, something is going wrong with your RAFIG... your "In Gear" values end up a lot lower than your "Park/Neutral" values.

    Try this update. Do a RAFIG but don't apply it to the tune, just log it... then do a short driving log and post both logs.
    Attached Files Attached Files

Page 5 of 5 FirstFirst ... 345

Similar Threads

  1. Surging Idle while Coasting
    By gpr in forum Gen III V8 Specific
    Replies: 24
    Last Post: September 18th, 2013, 02:43 PM
  2. Idle's good but fluctuates while coasting
    By ForcedC5 in forum General (Petrol, Gas, Ethanol)
    Replies: 22
    Last Post: December 17th, 2009, 04:54 PM
  3. Need help with coasting down to idle
    By stevedarman in forum Gen III V8 Specific
    Replies: 0
    Last Post: August 26th, 2009, 12:10 AM
  4. Surging idle issues - please help!
    By tunedportcj5 in forum General (Petrol, Gas, Ethanol)
    Replies: 1
    Last Post: October 22nd, 2006, 12:41 PM
  5. Idle RPM whilst coasting
    By LS1 Cobra in forum General (Petrol, Gas, Ethanol)
    Replies: 11
    Last Post: February 13th, 2005, 11:06 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •