Results 1 to 8 of 8

Thread: Idle Problem Help Please

  1. #1
    Senior Member
    Join Date
    Dec 2006
    Posts
    182

    Default Idle Problem Help Please

    I am in the middle of a project that I just got stuck with.

    The vehicle is a 2000 Camaro with a built engine. The engine has ported heads with a comp cams thumper cam I believe 109 separation with 282/303 duration and 227/241 at .050, aftermarket intake, headers.

    This engine will not idle at all, if started engine just dies. If I hold throttle open I can get the car to stay running but must be held above 1000 rpm. I can not get the car to idle to perform the the logs.

    I have attached the file from the car. Any help to get to idle and tuned would be greatly appreciated.

    Thank you for your help in advance.
    Attached Files Attached Files
    2007 LBZ 2011 LML Silverado Pickups
    2015 GMC Denali 3500 Dually Diesel Pickup
    2007 Dodge 6.7 Pickup

  2. #2

  3. #3
    Senior Member
    Join Date
    Dec 2006
    Posts
    182

    Default

    Thank you for your help

    I have been reading all these

    Post #17 says to set to these values

    {B4322} Idle Learn P/N Limit High 8
    {B4323} Idle Learn P/N Limit Low - 8
    {B4331} Idle Learn P/N A/C On Limit High 8
    {B4330} Idle Learn P/N A/C On Limit Low -8
    {B4324} Idle Learn Drive Limit High 8
    {B4325} Idle Learn Drive Limit Low -8
    {B4329} Idle Learn Drive A/C On Limit High 8
    {B4328} Idle Learn Drive A/C On Limit Low -8

    EFI Live will only let set to 4.23 or -4.23

    Any ideas on this
    2007 LBZ 2011 LML Silverado Pickups
    2015 GMC Denali 3500 Dually Diesel Pickup
    2007 Dodge 6.7 Pickup

  4. #4
    Lifetime Member macca_779's Avatar
    Join Date
    Jan 2007
    Posts
    327

    Default

    I leave those parameters standard. Learning is only needed if the base values are way off

  5. #5
    Lifetime Member
    Join Date
    Mar 2007
    Posts
    328

    Default

    As you have probably been reading, the main thing will be to try and get the airflow value half way close. If your still running a MAF, you can at least see about how much airflow you need for "idle" by holding the throttle and keeping it running at 1000 RPM. The actual amount of air for a lower idle speed will be a little lower, but it could serve as a starting point. If your running SD (no MAF), you can still find amount how air is necessary, but just need to record a few more PIDs (IAT, MAP, RPM) to calculate that value. The formula for calculating airflow for a SD setup are in those tutorials.

  6. #6
    Lifetime Member macca_779's Avatar
    Join Date
    Jan 2007
    Posts
    327

    Default

    Quote Originally Posted by turbo_bu View Post
    As you have probably been reading, the main thing will be to try and get the airflow value half way close. If your still running a MAF, you can at least see about how much airflow you need for "idle" by holding the throttle and keeping it running at 1000 RPM. The actual amount of air for a lower idle speed will be a little lower, but it could serve as a starting point. If your running SD (no MAF), you can still find amount how air is necessary, but just need to record a few more PIDs (IAT, MAP, RPM) to calculate that value. The formula for calculating airflow for a SD setup are in those tutorials.
    Or log RAFIG and apply the logged error to desired air

  7. #7
    Lifetime Member
    Join Date
    Sep 2012
    Posts
    243

    Default

    Like others on this site have already found, logging RAGIF may product airflow values too low. Get the MAF or VE dialed in and then do a histogram of the airflow and copy that into the desired airflow tables.

  8. #8
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    670

    Default

    Quote Originally Posted by Duramax 6.6L View Post
    I am in the middle of a project that I just got stuck with.

    The vehicle is a 2000 Camaro with a built engine. The engine has ported heads with a comp cams thumper cam I believe 109 separation with 282/303 duration and 227/241 at .050, aftermarket intake, headers.

    This engine will not idle at all, if started engine just dies. If I hold throttle open I can get the car to stay running but must be held above 1000 rpm. I can not get the car to idle to perform the the logs.

    I have attached the file from the car. Any help to get to idle and tuned would be greatly appreciated.

    Thank you for your help in advance.
    I just had a quick look at your tune file and your Desired Airflow and Desired Idle Speeds tables look stock. You're going to need more idle airflow and a higher idle speed with that cam. Your IAC effective area table also looks stock. Have you drilled or cracked your throttle blade?

Similar Threads

  1. Idle Problem and more
    By etmotorsports in forum E37, E38 & E67 PFI ECM's
    Replies: 78
    Last Post: September 9th, 2011, 02:53 AM
  2. Another Idle problem
    By kostelacd69 in forum Gen IV V8 Specific
    Replies: 9
    Last Post: December 18th, 2010, 05:28 AM
  3. Idle Problem
    By kostelacd69 in forum Gen III V8 Specific
    Replies: 0
    Last Post: December 16th, 2010, 07:54 AM
  4. idle problem
    By kostelacd69 in forum General (Petrol, Gas, Ethanol)
    Replies: 0
    Last Post: April 13th, 2009, 05:21 AM
  5. 02 TA idle problem
    By bigbucks39 in forum Gen III V8 Specific
    Replies: 11
    Last Post: October 24th, 2008, 11:45 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
  •