Page 3 of 9 FirstFirst 12345 ... LastLast
Results 21 to 30 of 81

Thread: Manual vs Auto

  1. #21
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Typical general logging:
    SAE.VSS
    SAE.RPM
    SAE.MAF
    SAE.MAP
    SAE.TP
    SAE.IAT
    SAE.ECT
    SAE.LONGFT1 & 2
    GM.HO2S11 & 21
    GM.SPARKADV
    GM.KR
    GM.EQIVRATIO
    GM.DYNAIR
    CALC.CYLAIR

    ~Moderator~

  2. #22
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    For idle tuning you need some other pids, including CALC.RAFIG and RAFPN...

    on the PIDs tab, if you go rightclick->More Info on a CALC pid it says what other pids are required to be selected.

    ~Moderator~

  3. #23
    Junior Member
    Join Date
    Dec 2013
    Posts
    49

    Default

    Ahh! Hiding in plain sight. lol
    OK, I'll eventually get the hang of this.
    I will create a new template and dashboard with the parameters you suggested (and under 25 channels) and capture more logs this weekend.
    Thank you again!
    Elm

  4. #24
    Junior Member
    Join Date
    Dec 2013
    Posts
    49

    Default

    OK-
    Here is the latest and greatest.
    I did modify the tune prior to this run- I multiplied the entire VE table by 1.2 to accommodate the difference in displacement of an LS1 vs a 409 SBC.
    Car didn't surge this time but it still wants to die whenever you flick the throttle unless you feather the throttle back to idle.
    The long term fuel trim also took a good 10 minutes of run time before it started displaying data and by the end of the run (16 minutes or so), the LTFT was -18% on both banks.
    I hope someone can make some sense out of this.
    Thanks,
    Elm

    Log_1GCCS19W328117273_0004.efi
    Last edited by ezobens; January 28th, 2017 at 05:02 PM.

  5. #25
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Ok, idle tuning requires the VE and MAF tables to be close.

    ~Moderator~

  6. #26
    Junior Member
    Join Date
    Dec 2013
    Posts
    49

    Default

    Joe,
    I don't know what that really means or how I get there?
    The VE table is 'air mass per cylinder' and the MAF parameter is 'flow rate vs frequency'.
    Apples to kumquats to me?
    Please explain what 'close' means in regard to the two and how do I get there?
    My apologizes for being so green with all this but I really do want to understand.
    Thank you,
    Elm

  7. #27
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    When the VE and MAF tables are close to the engine's actual physical conditions, then fueling/spark will be correct for those conditions, and the idle algorithms have a better chance of controlling idle...

    any differences in the throttle body and intake manifold from stock will require editing the idle tables in addition to correcting VE/MAF.
    Last edited by joecar; January 29th, 2017 at 03:00 PM.

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

    Default

    Let me point you to the Calc.VET procedure in the Gen III section...

    start with this procedure (it has links to various reading material), it is the easiest way to get started.

    The GM ECM's are quite complex, there are many interdependencies among the tables.



    ~Moderator~

  9. #29
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    When I get home to my laptop later tonite, I'll post some reading material url's.

    ~Moderator~

  10. #30
    Junior Member
    Join Date
    Dec 2013
    Posts
    49

    Default

    Thank you so much for your help and patience Joe!
    Yes, I probably have my work cut out for me-
    The entire configuration is non-stock from the engine to the FIRST TPI intake to the throttle body.
    Looks like I'll be doing lots of reading.
    Thank you for your time and advice with this.
    Elm

Page 3 of 9 FirstFirst 12345 ... LastLast

Similar Threads

  1. Auto to manual (tune)
    By K3vin in forum Tips and tricks
    Replies: 18
    Last Post: November 22nd, 2016, 08:58 AM
  2. manual switch for auto
    By smellyflange in forum General
    Replies: 0
    Last Post: August 4th, 2013, 04:59 PM
  3. auto to manual e38
    By dags in forum Gen IV V8 Specific
    Replies: 10
    Last Post: March 6th, 2010, 08:18 AM
  4. Conversion of Auto to manual.
    By odd boy in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 4
    Last Post: February 18th, 2009, 08:58 AM
  5. V4 License auto or manual
    By leibhold in forum Purchase and Shipping
    Replies: 8
    Last Post: November 26th, 2008, 04:54 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
  •