Results 1 to 4 of 4

Thread: Newbie w/cam swap idle issue

  1. #1
    Junior Member
    Join Date
    Jul 2008
    Posts
    19

    Default Newbie w/cam swap idle issue

    Hello-

    Over the couse of the past year I've been customizing my 1999 GMC 4x4 stepside. This past week I installed a Z06 cam. At startup the engine idle speed swings from 2000 rpm to 500 a couple of times then dies. After a couple of these attempts, the engine finally settles down around 800 rpm.

    I'm new to using the efilive tuning software. I've made some program changes in the past and I have looked over the idle tuning tutorials, but a little overwhelmed by it. Are there any changes I can make now to get idle somewhat controlled at startup, till I can take more time to tweak it in?

    The truck has a 5.3L engine with a Radix Magnacharger, OS is 09379910, transmission is a 4L60E. I am attaching latest tune file . Any help would be greatly appreciated! Thank you,
    Attached Files Attached Files

  2. #2
    Lifetime Member
    Join Date
    Mar 2005
    Posts
    355

    Default

    first see what your idle steps are at...this will show you weather you have enough initial throttle opening. You may have to much or not enough. Make any adjustments just a tweak not half a turn
    Once you have it up to temperature and idling check the IAC steps and adjust the throttle blade until you achieve somewhere between 30 to 50 steps then report back
    "Just a tune > yeah right !!!! "

  3. #3
    Junior Member
    Join Date
    Jul 2008
    Posts
    19

    Default

    Thanks for the reply. What idle step values should I be shooting for?

  4. #4
    Lifetime Member
    Join Date
    Mar 2005
    Posts
    355

    Default

    30 to 50 ish,
    oh and make sure your TPS at idle is under the switch point, usually less than 1.19. If it goes over your idle stratagy will never will never kick in....If it does go over because it has to, do a tps reset which sets it back to zero again.
    Mike.
    "Just a tune > yeah right !!!! "

Similar Threads

  1. Idle issue
    By Harrismarine in forum General (Petrol, Gas, Ethanol)
    Replies: 8
    Last Post: May 21st, 2008, 05:27 PM
  2. Idle issue
    By Jakes4321 in forum Gen III V8 Specific
    Replies: 2
    Last Post: January 7th, 2008, 11:49 AM
  3. misfire issue after 411 swap
    By makoskey in forum Vortec V6/V8 Specific
    Replies: 4
    Last Post: December 21st, 2007, 08:05 AM
  4. Tachometer Issue after Motor Swap
    By MrZ71man in forum General (Petrol, Gas, Ethanol)
    Replies: 0
    Last Post: November 8th, 2007, 04:42 PM
  5. odd off idle issue
    By truethinker in forum General (Petrol, Gas, Ethanol)
    Replies: 2
    Last Post: July 10th, 2007, 03:12 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
  •