Results 1 to 9 of 9

Thread: Idle surge coming to a stop

  1. #1
    Senior Member
    Join Date
    Feb 2006
    Posts
    113

    Default Idle surge coming to a stop

    This is on a OLSD tune.Been having this problem on 3 built cars that are all 00 Camaro's.I'm ussing different base files for 01 +02 Camaro's with the same problem.

    The cars all have the same problem. 50% of the time they idle fine when coming to a stop.Then for no reason coming to a stop they will drop idle to 200-500rpm or all completely die.The A/F's are set to 14-1 to 15-1.Timing base is holding at 24-28 degree's.Cars are showing no signs except extremely slow IAC count at idle -sometimes.

    I've adjusted all throttle follower and cracker tables with no fix.

    any idea's? I'm starting to think the base 2000 computer is the problem.

  2. #2
    Senior Member
    Join Date
    Feb 2006
    Posts
    113

    Default

    Slowdown the answers please

    Well,it still does it nomatter what I change.I even got it to hang idle at 1400rpm coming to a stop but sometimes it will just die for no reason.I see that the IAC just drops to idle setting and I'm trying to get it to ramp down but it just won't.It is also stupid slow to react when the idle drops to 300rpm,takes about 5-10 seconds for it to react and open the IAC more.Then it revs to 2000rpm.

    stupid computers.

  3. #3
    Lifetime Member Chuck CoW's Avatar
    Join Date
    Feb 2006
    Posts
    471

    Default Don....Call me....

    Quote Originally Posted by slowhawk
    Slowdown the answers please

    Well,it still does it nomatter what I change.I even got it to hang idle at 1400rpm coming to a stop but sometimes it will just die for no reason.I see that the IAC just drops to idle setting and I'm trying to get it to ramp down but it just won't.It is also stupid slow to react when the idle drops to 300rpm,takes about 5-10 seconds for it to react and open the IAC more.Then it revs to 2000rpm.

    stupid computers.


    Don, Give me a buzz.... I have an 02 ZO6 running COS5 with a Road Runner and I'm seeing something similar.....

    I'll possibly have time some time friday to chat about it.

    914-332-0049
    Chuck
    CoW BOOSTER! Electronic Throttle Enhancement.

    - CLICK HERE NOW FOR MORE INFORMATION! -

    VARARAM, EDELBROCK, AMERICAN RACING HEADERS, BAER BRAKES, BORLA, EFI Live, Magnuson,
    COMP Cams, PROCHARGER, PRO TORQUE, PHADT Racing, INNOVATORS WEST, and more.



  4. #4
    Lifetime Member SSpdDmon's Avatar
    Join Date
    Jun 2005
    Posts
    1,558

    Default

    Quote Originally Posted by slowhawk
    This is on a OLSD tune.Been having this problem on 3 built cars that are all 00 Camaro's.I'm ussing different base files for 01 +02 Camaro's with the same problem.

    The cars all have the same problem. 50% of the time they idle fine when coming to a stop.Then for no reason coming to a stop they will drop idle to 200-500rpm or all completely die.The A/F's are set to 14-1 to 15-1.Timing base is holding at 24-28 degree's.Cars are showing no signs except extremely slow IAC count at idle -sometimes.

    I've adjusted all throttle follower and cracker tables with no fix.

    any idea's? I'm starting to think the base 2000 computer is the problem.
    Throttle cracker is for off-throttle issues (ie rolling idle). Throttle follower is for on-throttle issues.

    I'm curious to see what you have done. Can you post up the tune and list of mods? Any reason why the factory OS wasn't the right answer for you?

  5. #5
    Junior Member brokenfly's Avatar
    Join Date
    Mar 2007
    Posts
    45

    Default

    i have had some good results slowing down the rate of decay in the {B4317} table...
    2004 A4 GTO OLSD 6.75@102.32mph 1/8th mile...
    http://www.youtube.com/watch?v=IB9sJ_W6QDY
    LS6 Factory Heads,Cam,Stall,N2O...

  6. #6
    Lifetime Member
    Join Date
    Mar 2005
    Posts
    355

    Default

    try ramping up the base timing as the revs drop. What I do is leave 800-1000 rpm at say 28 degrees ( perferred idle timing ) then at 400 put 30 degrees and 32 deg at zero rpm, this helps the over/under spark flare settings to get on top on an idle droop quickly
    "Just a tune > yeah right !!!! "

  7. #7
    Lifetime Member
    Join Date
    Jul 2003
    Posts
    1,897

    Default

    The first step would be to check the desired airflow table and that rafigs are close to 0 and/or learning is enabled at a lower temperature so you can see what is going on.

    When is this happening and do you have a big cam in them?
    "All that is needed for the triumph of evil is that good men do nothing..."

  8. #8
    Member
    Join Date
    Sep 2006
    Posts
    74

    Default

    On standard shift cars I turn off the throttle cracker.

  9. #9
    Senior Member
    Join Date
    Feb 2006
    Posts
    113

    Default

    Quote Originally Posted by SSpdDmon
    Throttle cracker is for off-throttle issues (ie rolling idle). Throttle follower is for on-throttle issues.

    I'm curious to see what you have done. Can you post up the tune and list of mods? Any reason why the factory OS wasn't the right answer for you?
    I ended up getting it but forget now what I did.The car has easilly 60 downloads into it trying everything 1 by 1. The main problem was I only have these isssue's on 99/00 cars.Never a problem on 01/02 cars even though I'm running the same exact bin files.

Similar Threads

  1. ***Need help with idle surging while coming to a stop please***
    By WICKEDOWESIX in forum Gen III V8 Specific
    Replies: 10
    Last Post: December 30th, 2009, 07:38 AM
  2. small surge when coming to stop
    By whackem04 in forum Duramax LLY
    Replies: 6
    Last Post: December 28th, 2009, 08:50 AM
  3. B4317 to drop idle faster when coming to a stop?
    By mvvette97 in forum Gen III V8 Specific
    Replies: 8
    Last Post: August 4th, 2009, 05:53 AM
  4. Idle hangs for a few seconds when coming to a stop
    By DaddySS in forum Gen III V8 Specific
    Replies: 6
    Last Post: September 4th, 2007, 06:52 PM
  5. Surging when coming to a stop
    By 12secformula in forum Gen III V8 Specific
    Replies: 7
    Last Post: December 18th, 2006, 01:01 PM

Posting Permissions

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