Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Help with OLSD idle????

  1. #1
    Senior Member
    Join Date
    Jan 2011
    Posts
    131

    Default Help with OLSD idle????

    So this winter I installed a new turbo cam in the car(Isky 3x12). I have tried to follow the idle tips and tricks sticky but its just not seeming to work. Are some of the pids not able to be chosen if its OLSD. What i am having an issue with is the car starts ok cold it stumbles a little bit then idles fine. Once you drive it and get it warmed up it fires up stumbles then dies you crank it up again and it fires right up and stays running. Also once warm it kind of surges around wants to die say when you pull into a parking lot and switch drive to reverse or vice versa. Any tips would help out greatly. I've searched this sight all over to find the problem i am having and nothing comes up. I am attaching the tune as wellrambler after dyno 7 third gear.ctz

  2. #2
    Lifetime Member darcy's Avatar
    Join Date
    Feb 2012
    Posts
    223

    Default

    Fix your main VE. There are steps of over 50% between adjacent cells - it has no hop eof running smoothly and consistently like that.

    From what I can google, that cam is 212/212/112 - if so, given its only a pretty mild cam, I would go back and start with a stock table and get that sorted before worrying about the idle.

  3. #3
    Senior Member
    Join Date
    Jan 2011
    Posts
    131

    Default

    I guess i should mention it has 80lb deka injectors. I guess my injector tables are off is what's causing the big difference in the ve table. I have done an auto ve three times and it runs perfectly other than the stumble when changing gears

  4. #4
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    BTW: unrelated, if you're running an auto trans, set D0960,1,2 to 100% everywhere.

  5. #5
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Make sure that get a MAF DTC.

    VE table has many steps like darcy said.

    Are you running boost...?

    What HP are you expecting...?

    Yes, you will need the correct data in other injector tables.

  6. #6
    Senior Member
    Join Date
    Jan 2011
    Posts
    131

    Default

    Yes running 15psi boost its perfect in and out of boost. Just the idle on warm start ups and like if your pulling into a parking lot and switch to reverse to back up to a spot it wants to surge and sometimes die if you let off the gas a little to fast.

  7. #7
    Senior Member
    Join Date
    Jan 2011
    Posts
    131

    Default

    It dynoed 535 on 13psi. Last week.

  8. #8
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Are you expecting to make more (those injectors are too big for 550 HP)...?

  9. #9
    Senior Member
    Join Date
    Jan 2011
    Posts
    131

    Default

    Yes its on low boost for this turbo setup i have now. Going to be putting a gt4202 on it here shortly and turning the boost up to around 20 psi. I just cant figure out the stumble and the warm start and idle. It will start right up and idle around 14.5 to 15. But once warm gradually makes its way down to about 12.8. Ive tried messaging with the small pulse but it never seems to change anything. Ive tried adding idle airflow but then it starts even worse. I just can figure out wats causing it all.

  10. #10
    Lifetime Member
    Join Date
    Dec 2014
    Posts
    230

    Default

    What fuel pressure are you running?

Page 1 of 2 12 LastLast

Similar Threads

  1. olsd flash no.crank
    By relentless addiction in forum General (Petrol, Gas, Ethanol)
    Replies: 20
    Last Post: August 28th, 2012, 10:28 AM
  2. Rich at idle OLSD??? Tune attached, any help?
    By T&A Custom Rides in forum Gen III V8 Specific
    Replies: 8
    Last Post: February 9th, 2012, 05:05 PM
  3. Need help tuning olsd without o2 sensors
    By 02sierra4x4 in forum Gen III V8 Specific
    Replies: 15
    Last Post: September 28th, 2009, 04:16 PM
  4. Just went from OLSD to CLSD, some questions
    By Kevin Doe in forum General (Petrol, Gas, Ethanol)
    Replies: 24
    Last Post: July 7th, 2008, 07:53 AM
  5. How to compensate for altitude changes in OLSD
    By thunder550 in forum General (Petrol, Gas, Ethanol)
    Replies: 1
    Last Post: October 10th, 2007, 03:32 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
  •